baber/WOPTO huggingface dataset:
Patent KR-970003442-B1 (KR)
Title: Optical path regulator for projector
Inventor: JI JUNG-BUM
IPC: H04N5/72
Filed: 1993-07-31
Granted: 1997-03-18
Abstract: a driving substrate where transistors are built in and which has pads connected with the transistors electrically on its surface; an actuator array which is built in the driving substrate in order that signal electrodes are contacted with pads by arranging several actuators in a matrix; and a mirror attached on the top surface of insulation layers. The actuator comprises a signal electrode formed on the bottom surface of a ceramic wafer, and a first and a second bias electrode which are formed on the top surface of the ceramic wafer and are separated by the insulation layers, and the actuator defines the bottom of the first and the second bias electrode as a first and a second transformation part and defines the bottom of the insulation layer as a buffer part.
Patent KR-960014512-B1 (KR)
Inventor: HASEBE HIROYUKI
IPC: B22F1/068
Filed: 1993-09-14
Granted: 1996-10-16
Abstract: 내용 없음.
Patent KR-100294783-B1 (KR)
IPC: C08F4/659
Filed: 1993-09-24
Granted: 2001-09-17
Abstract: Copolymers of ethylene with comonomers selected from (a) alpha-olefins, (b) cycloolefins and/or (c) dienes, characterized by the fact that: the molar percentage of the comonomer (%  alpha ) and the density of the copolymer (D) satisfy the relation %  alpha  + 150D </= 141.
Patent KR-0139618-B1 (KR)
Inventor: KANG DONG-GEUM
IPC: G11C11/407
Filed: 1993-12-03
Granted: 1998-07-15
Abstract: 본 발명은 반도체 장치의 지연부 선택 회로에 관한 것으로서, 특히 반도체 회로 설계시 많은 부분의 지연 회로가 연결 및 단절될 경우 레이저 장비를 이용하여 간단히 지연부의 가감을 실현할 수 있도록 한 반도체 장치의 지연부 선택 회로에 관한 것이다. 
     이를 위하여 지연부를 포함하는 반도체 장치의 지연부 선택 회로에 있어서, 퓨즈의 연결 및 단절에 따라 소정 신호를 발생하는 신호 발생기와, 상기 신호 발생기의 출력 신호에 의해 동작되어 입력 신호가 지연부를 통과, 또는 불통과 하도록 하는 최소한 하나의 지연부 패스게이트와, 상기 신호 발생기의 출력 신호에 의해 동작되어 입력신호가 지연부를 통과하지 않고 직접 출력단으로 전송되도록 하는 우회 패스게이트를 포함하여서 된 것이다.
Patent KR-960007779-B1 (KR)
Title: Method for removing a sludge of plating solution
Inventor: LEE JAE-YOUNG
IPC: C25D21/00
Filed: 1993-12-09
Granted: 1996-06-12
Abstract: This method is achieved by the processes of (1) controlling of pH of plating solution in tank, and plating solution during sludge treatment, (2) treating of sludge, (3) oxidizing of solution by introducing one kind selected from the group of oxide medium composed of air, oxygen and oxygenated water, and (4) filtering of sludge in plating solution under controlled pH. Here, this plating solution is Zn or Zn-Ni plating solution, and plating process is radial cell type. At the controlling step of pH, pH of plating solution is adjusted 1.5 to 3.0. At the treating step of sludge, pH is solution is adjusted 3.0 to 4.5. At the oxidizing step of solution, the introducing volume in case of air as oxide medium is 1 to 5L/min per 1L solution. In case of oxygen, the introducing volume is 0.2 to 1L/min per 1L solution. In case of oxygenated water, the volume is 1 to 10 times of the mole number of Fe+2 ion in plating solution.
Patent KR-970002499-B1 (KR)
Title: Test specimen position estimating method
Inventor: AHN HYUN-SIK
IPC: G01N1/00
Filed: 1993-12-27
Granted: 1997-03-05
Abstract: An optimum analysis rod position detection method for a test piece searches an optimum position by avoiding a groove of a metal test piece, and then precisely analyzes a test piece of an ingot steel. The method includes the steps of: obtaining a test piece surface image having two values of 1 and 0; making a right-angled tetragon about O area, performing a magnification by the pixel number corresponding to a constant radius, and calculating analysis area; dividing an analysis area as a square form of a constant size in order to detect an optimum two-position, and making an array composed of pixels whose center coordinate and light/darkness degree are "1"; sorting the obtained value from the array, selecting two positions according to a priority order, and detecting two positions separated from each other by an analysis rod diameter.
Patent KR-0138733-B1 (KR)
Inventor: WATANABE KENJI
IPC: G02B7/02
Filed: 1993-12-28
Granted: 1998-05-15
Abstract: 나사 장책대를 가지는 렌즈 경통은 렌즈 경통이 부착되게 되는 카메라 본체의 대응나사 장착대에 의하여 맞물림될 수 나사부를 가지는 장착링, 장착링에 의하여 회전가능하게 지지되는 초점조절링, 초점조절렌즈를 지지하기 위하여 초점조절링에 의하여 나사 맞춤되는 경통본체, 장착링에 의하여 회전가능하게 지지되어 초점조절렌즈의 광축방향으로만 이동하도록 경통 본체의 이동을 규제하는 직진안내부재, 및 장착링에 대한 직진안내부재의 회전운동에 저항을 주는 마찰저항부재를 포함하고 있다. 
     마찰저항부재는, 초점조절링이 회전할 때는 장착링에 대한 직진안내부재의 회전은 발생하지 않으며, 회전력이 경통 본체에 작용될 때 직진안내부재가 장착링에 대하여 회전될 수 있도록 설정된 마찰력을 제공한다.
Patent KR-960012790-B1 (KR)
Title: Repair efficiency increasing circuit using option process
Inventor: NAM JONG-KI
IPC: G11C11/406
Filed: 1993-12-29
Granted: 1996-09-24
Abstract: a pass transistor and a fuse controlled by a block row address signal which is inputted regardless of refresh option; a pass transistor and a fuse controlled by the block row address signal which is inputted according to refresh option; a pass transistor and a fuse controlled by a column address signal which is inputted regardless of refresh option; and a pass transistor and a fuse controlled by the column address signal which is inputted according to refresh option.
Patent KR-970002762-B1 (KR)
Inventor: MENICH BARRY J
IPC: H04W36/30
Filed: 1993-01-27
Granted: 1997-03-10
Abstract: 내용없음.
Patent RO-118507-B1 (RO)
Title: Process for making the magnetic circuits of the electric generators with permanent magnets for wind turbines and of the magnetic circuits of the electric machines
Inventor: PREDESCU MIHAIL
IPC: H02K1/06
Filed: 2000-03-07
Abstract: The invention relates to a process for making the magnetic circuits of the synchronous electric generators with permanent magnets for wind turbines, with or without housing, of reduced speed, with the permanent magnets for wind turbines which may be applied for manufacturing the prototypes in small and average series, as well as in making the magnetic circuits of the electric machines in a wide range, from electrical micro-machines to high power electrical machines. According to the invention the process consists in that the steel sheets of the magnetic circuit are carried out by the chemical etching process, namely a 1:1 image film is made accoring to the steel sheet design, which is copied, by the photographical technique, onto cold rolled siliceous sheet which previously was coated with solid or liquid photosensitive material. The image impressed on each siliceous steel sheet is developed, then the siliceous steel sheet metal having the steel sheet image is etched chemically until the penetration of the material, there being obtained the steel sheet or the steel sheet section. This process applied for makng the rotor of the synchronous electric generators with permanent magnets and magnetic field concentration ensures the elimination of the clearances which diminishes the field in the electrical gap.
Patent RO-118930-B1 (RO)
Title: Selective vegetable extract with antitumour effect
Inventor: ISTUDOR VIORICA
Filed: 2000-06-12
Abstract: The invention relates to a selective vegetable extract with antitumour effect prepared by using 65...80% Medicago sativa L. and 2.5...10% Cuscuta campestris Yunck herba and/or non-selected seeds thereof by in-series repeated extraction of 500 g of a mixture thereof with aqueous and non-aqueous solvent, the resulting solutions being afterwards concentrated by lyophilization and atomization at reduced pressure, up to the stage of dry extracts containing 5% humidity at the most, said extracts being then joined together and kneaded with for their homogenization, the extract having finally a content of at least 0.25% flavones expressed as rutoside and at least 3%/g total polyphenols expressed as caffeic acid, and to the process for preparing said extract.
Patent RO-120121-B1 (RO)
Title: Injectable solution having antiinflammatory effect, process for preparing the same and method for treating autoimmune diseases
Inventor: IONASCU ELENA
IPC: A61K9/08
Filed: 2000-12-18
Abstract: The invention relates to an injectable solution having antiinflammatory effect, comprising 1... 700 mg powder of organic salts, soluble in water, obtained from the ash resulting from the calcination of the roots of Symphytum officinale, dissolved in 100 ml of distilled water or physiological salt associated or not with 0.1 ... 0.2 lidocaine, for intramuscular injectable solution; the process for preparing the injectable solution has the following steps: cutting the roots into pieces, drying and calcinating the vegetable material at a temperature ranging from 500 to 600 C, for 3-4 hours, dissolving the resulting ash in distilled water, in a ratio of 1: 100, filtering under vacuum, evaporating and drying the viscous liquid at a temperature ranging from 200 to 250 C for 5...15 min, there being obtained a white active powder; the method for treating the autoimmune diseases provides the administration of the injectable solution in a dosage of minimum 30 mg/70 kg body weight intramuscularly, daily for 10 days consecutively, and then one dosage a week, in alternation with intravenous administration.
Patent RO-121940-B1 (RO)
Title: Process for obtaining some heavy liquid fuels for furnaces
Inventor: GRIGORE VASILE
IPC: C10L1/18
Filed: 2005-02-18
Abstract: The invention relates to a process for obtaining some liquid fuels for furnaces. According to the invention, the process consists in that up to 70% black oil or similar refinery products are mixed, under stirring, with up to 30% fractions of primary distillation of Diesel oil type, with up to 9.8% residual oil of pyrolisis oil type, there is stirred for 1 h for homogenization, afterwards the exceeding water is eliminated by emulsifying with an usual non-ionic surfactant and it is added 0.15...0.2% additive for improving burning based on oxidating organic compounds or organo-metallic complexes, the obtained fuel having a caloric power of up to 10000 kcal/kg and leads to a reduction of the noxious substances in the burning gases by 70%.
Patent RO-122718-B1 (RO)
Title: Device for mounting elastic elements of the elastic safety device type into bore holes
Inventor: HACMAN MIHAI
IPC: B23P19/08
Filed: 2007-09-18
Abstract: The invention relates to a device for the quick, simple and safe mounting of an elastic element of the safety device type into a bore. According to the invention, the device comprises a body (1) that, by means of a pushing piston (2), ensures the displacement of an elastic element. A guiding bushing (3) carries out the positioning thereof on a mounting part and the decrease of a diameter of the elastic safety device-type element, while a wedge (4) ensures the positioning of the elastic element.
Patent RO-127006-B1 (RO)
Title: Equipment for dynamic hydroforming for high pressure and vibrations tubes
Inventor: FRUNZĂ MIRCEA
IPC: B30B7/04
Filed: 2010-07-05
Abstract: The invention relates to a dynamic hydroforming installation for a complex hollow piece. According to the invention, the installation comprises a hydraulic press () with three axes, driven by a driving unit (), by means of a high pressure hydraulic amplifier (), the hydraulic press () consisting of a vertical frame type construction () wherein there is placed a hydraulic cylinder () for closing a system of half moulds () located in a modular hydroforming construction () placed on a chassis plate () located inside a horizontal frame type construction () wherein there are mounted three horizontal hydraulic cylinders () forming two other force axes, of which the first two above-mentioned hydraulic cylinders () determine the sealing force on the ends of a hollow semifinished product () to be hydroformed by moving two rods () guided through two bores () cut in the two half moulds () and the hydraulic cylinder (), for ensuring the reaction forces upon the deformation of the hollow piece, in said rods () there being cut one of some channels () for supplying the enclosure of the hollow semifinished product to be hydroformed with a hydraulic medium and for discharging the hydraulic medium after hydroformation, in the two half moulds () there being installed some modular elements () which in various configurations ensure a plurality of shapes and size types for the hydroformed hollow pieces, on the rod () guided by the first above mentioned half mould () there being installed a hydrostatic pulse piezoelectric generator ensuring, besides the high hydroforming pressure created by the hydraulic unit () in the hollow semifinished product () to be hydroformed, the generation of pulses.
Patent RS-54488-B1 (RS)
Inventor: ÅSLUND BENGT LEONARD
IPC: C07D489/04
Filed: 2011-09-29
Abstract: Kristalna oksalatna so, naznačena time, što je pomenuta so mPEG7-O-naloksola.Prijava sadrži još 13 patentnih zahteva.
Patent SA-111320802-B1 (SA)
Inventor: ALEJANDRO FLORES
Filed: 2011-10-01
Abstract: حمالات Bearings لأدوات حفر أسفل الأرض downhole tools مشتملة على عضو تحميل bearing member أول وعضو تحميل ثانى، واحدة على الأقل من أعضاء التحميل bearing members الأولى والثانية لها قناة مشكلة channel formed فيها وتتضمن طرق Methods تبريد cooling الحمالات لأدوات الحفر أسفل الأرض تدفق flowing مائع fluid فى قناة مشكلة فى عضو تحميل واحد على الأقل. وتنقل transferred الحرارة Heat من على الأقل عضو تحميل واحد على الأقل إلى المائع. ويتدفق المائع بعيداً عن عضو تحميل واحد على الأقل.
Patent SA-112340126-B1 (SA)
Title: Global crude oil quality monitoring
Inventor: ARTHUR H ROSE
Filed: 2012-12-22
Abstract: A method for monitoring global crude oil quality. The method includes the steps of obtaining samples of a crude oil having a quality, generating characterization data from measurements of samples of the crude oil, determining values of properties of an assay of the crude oil using the data of step a), storing the values of the properties of the assay in a database, determining deviations of the values of the properties of the assay from the values of the properties of a recommended assay having a quality, determining a statistical significance of the deviations of the values of the properties of the assay from the values of the properties of the recommended assay to determine if the crude oil quality is different from the quality of the recommended assay, and determining if the statistical significance indicates a change in the economic valuation between the assay and the recommended assay.
Patent SA-518390834-B1 (SA)
Title: Novel Combination for use in the Treatment of Cancer
Inventor: CAO ZHU
Filed: 2018-01-29
Abstract: The present invention relates to a pharmaceutical composition comprising a PD-1 antagonist and an M-CSF antagonist. The present combination can be administered independently or separately, in a quantity which is therapeutically effective for the treatment of cancer. The invention also provides the use of such a combination for the manufacture of a medicament; the use of such a combination as a medicine; a kit of part comprising such a combination; and a method of treatment of such a combination. Fig. 1
Patent SA-518400189-B1 (SA)
Title: Pipe deployment trailer
Inventor: ALEXANDER LEE WINN
Filed: 2018-10-07
Abstract: A trailer is provided having a trailer base and a trailer bed mounted to the trailer base. The trailer includes at least one actuator coupled to the trailer bed and the trailer base that raises and lowers the trailer bed. When the at least one actuator is extended, the trailer bed is raised to a vertical orientation. When the at least one actuator is retracted, the trailer bed is in the horizontal orientation. The trailer includes a lifting head protruding outwardly from the trailer bed. The position of the lifting head is adjustable along a longitudinal axis of the trailer bed. Fig 2.
Patent SA-518400634-B1 (SA)
Title: Low-Phosphorus and Non-Phosphorus Gelled Hydrocarbon Well Treatment Fluids
Inventor: SEHMUS OZDEN
Filed: 2018-12-11
Abstract: Gelled fluids include a gellable organic solvent, an aluminum crosslinking compound, and a mutual solvent. The gelled fluids may be prepared by combining an aluminum crosslinking compound and a first volume of a gellable organic solvent to form a pre-solvation mixture; gelling the pre-solvation mixture to form a pre solvated gel; combining the pre-solvated gel with a formulation fluid to form a gellable mixture, the formulation fluid comprising a second volume of the gellable organic solvent; and gelling the gellable mixture to form the gelled fluid. Fig 1.
Patent AU-2016259360-B1 (AU)
Title: A novel crystalline form of chlorfenapyr, a process for its preparation and use of the same
Inventor: BRISTOW JAMES TIMOTHY
IPC: A01N43/36
Filed: 2016-11-16
Abstract: The present invention describes the crystalline form of chlorfenapyr of formula (I), the crystal preparation process, and the analyses of the crystal through various analytical methods and using the crystal to prepare stable agrochemical formulation. The invention 5 also describes the use of various solvents towards the crystalline form preparation conditions. Br C==N
Patent WO-2006136176-B1 (WO)
Title: Procede et dispositif permettant de gerer un objet et des parties de celui-ci
Inventor: TANGSOO URMAS
IPC: G05B19/418
Filed: 2006-06-06
Abstract: L'invention concerne un procédé et un dispositif permettant de connecter des dispositifs électriques et électroniques dans un réseau intégré. Le dispositif comprend un ordinateur monofonctionnel, à savoir une unité de commande programmable et une unité de commande d'actionneur. Le dispositif comprend deux canaux d'informations ou réseaux. Par l'intermédiaire du réseau intérieur, l'échange d'informations est assuré entre l'unité de commande programmable et l'unité de commande d'actionneur. Le réseau intérieur peut être : un réseau électrique à courant alternatif, un réseau câblé basse tension séparé, un réseau de radiocommunication. Le réseau Internet public permet d'assurer le changement de paramètres système de l'unité de commande programmable par l'intermédiaire d'une interface WEB et d'informations sécurisées associées à l'objet pour l'opérateur système. Le réseau Internet permet de télécharger dans l'unité de commande programmable des mises à jour logicielles à partir du serveur de services logiciels de l'opérateur et des modules logiciels de nouvelles applications de l'unité de commande du dispositif effectif. La mise à jour des noeuds et la commande des éléments du dispositif sont effectuées en temps réel.
Patent WO-2006061444-B1 (WO)
Title: Multifunctional modular system for energy transformation
Inventor: BAQUERO MOCHALES MACARIO
IPC: B60L13/04
Filed: 2004-12-03
Abstract: The invention relates to a multifunctional modular energy transformation system which is particularly suitable for levitation railway transport, which consumes much less energy than hitherto-known systems since levitation is achieved using a magnetic generating system having a constant force and stable equilibrium, and which is energetically self-sufficient by transforming H2O into hydrogen and oxygen by means of solar energy captured by the system.  The inventive system is of minimal weight and is not harmful to the environment.  The invention comprises magnetic assemblies which are disposed on non-ferromagnetic supports that are preferably made from aluminium and encapsulated in resin and magnets which are disposed longitudinally in a continuous manner.  In this way, the system enables the non-punctiform application of constant distributed forces, unlike hitherto-known systems in which the electrical impulses necessary to generate the punctiform magnetic field required for levitation and movement are so intense and of such force as to give rise to significant problems in terms of construction, control and maintenance that do not arise with the inventive system.
Patent WO-2004113166-B1 (WO)
Title: Gyroptere a securite renforcee
Inventor: GUILHOT-GAUDEFFROY MICHEL
IPC: B64C27/20
Filed: 2004-06-18
Abstract: Gyroptère à voilures tournantes contrarotatives coaxiales, avec en particulier celui de deux rotors couronnes tournantes (2,1) en sens inverse autour d'une nacelle (6) soit en version drone, soit en version nacelle habitée, avec procédé du pilotage de la machine par la commande de l'incidence des pales par des anneaux de commande, la sécurité est avantageusement renforcée par des structures adaptée, une enveloppe protectrice multifonction (27) par un système de sustentation entre les couronnes (2,1) et la nacelle (6) tant pour les forces radiales qu'axiales participe à la maîtrise optimisée des tensions, et avec commandes électriques adaptée tant pour modélisme, drone, qu'aéronef habité et ou piloté.
Patent WO-2008078306-B1 (WO)
Title: Bateau à assiette variable
Inventor: CURATOLO ENRICO
IPC: B63B3/08
Filed: 2007-12-21
Abstract: La présente invention concerne un bateau à assiette variable comprenant une paire de corps creux (1) qui sont situés sur les côtés du bateau (100), dans une position symétrique à l'axe longitudinal, et qui s'étendent du centre de la coque jusqu'à la poupe. Les corps creux (1) comportent des structures de caisse à chambre antifuite qui sont isolées du bateau et sont conçues pour être maintenues vides ou être remplies d'eau afin d'améliorer l'assiette et la stabilité du bateau, à la fois dans des conditions statiques et dans des conditions dynamiques.
Patent IT-1318316-B1 (IT)
Title: Transmission gearbox device of multiple speed adjustable fabric winding machine with safety pin to prevent the generation of abnormal stretching force required for outputting the fabric
Inventor: CHIN-YUNG LIN
IPC: D06C/
Filed: 2000-08-02
Granted: 2003-07-28
Abstract: Disclosed is a transmission gearbox device of multiple speed adjustable fabric winding machine with safety pin. In the gearbox, a course adjusting gear set, a fine adjusting gear set, a stepped gear set, a clutch transmission set, and several sets of transmission shafts are provided. When power is transmitted to the fabric winding transmission shaft, the course and fine adjusting gears pivoted on the fabric winding transmission shaft are driven by the transmission gears respectively, and selectively mesh with gears of various gear ratios, to transmit the power in turn to the clutch transmission set. Using a clutch slide to control the clutch transmission set to mesh with any gear of the stepped gear set, power transmission and selective change operation of acceleration or deceleration can be achieved. The required power is transmitted to a fabric spreading transmission shaft through a safety pin device, to form a structure which is suitable for processing various precise speed changes of the round knitting machine, so as to make the pitches of the designated fabric code stable and consistent, and to prevent the generation of abnormal stretching force required for outputting the fabric.
Patent JP-3278436-B1 (JP)
Title: 家庭用ゲーム等のゲーム広告課金システム、プログラム及びゲーム広告課金制御方法
IPC: A63F13/33
Filed: 2001-06-29
Granted: 2002-04-30
Abstract: 【要約】
【課題】  ゲーム広告に対する課金を合理的なものとす る。
【解決手段】  ゲーム広告の表示量情報（表示時間や面 積）又は表示品質情報（ゲーム画面における表示位置、 広告画像についてクリッピングの有無、仮想３次元空間 における広告表示方向）に基づいてゲーム広告に対する 課金額を算出する。また、予め取得された広告対象とな るプレイヤの属性情報とゲームを楽しむプレイヤの属性 情報とに基づき、広告出力に対する課金額を算出する。
Patent JP-3515569-B1 (JP)
Title: 張線器
IPC: H02G7/02
Filed: 2003-05-29
Granted: 2004-04-05
Abstract: 【要約】
【課題】最初に取付けた把持具の電線からの離脱を防止 することができる張線器の提供
【解決手段】この発明の張線器は、引張りレバ−６の先 端部に、バネ力によって、本体１の固定軸２と引張りレ バ−６との間の空間部７に嵌入・離脱が可能な三角形状 の楔８を設置した構成になっており、三角形状の楔８を 本体１の固定軸２と引張りレバ−６との間の空間部７に 嵌入させ、クランプレバ−３の動きを拘束させているの で、把持具の電線からの離脱を防止することができる。
Patent JP-3869459-B1 (JP)
Title: 自転車放置防止用点字ブロック
IPC: E01F9/553
Filed: 2006-03-28
Granted: 2007-01-17
Abstract: 【課題】個人の良識によらず、点字ブロックの上に障害物を放置できない構造にすることによって視覚障害者等が不自由なく利用できる点字ブロックを提供すること。 
【解決手段】本発明の点字ブロックは、底板１１の上方に、通行者の進行方向に対して垂直方向に伸びる第１クッション層１２と、当該第１クッション層１２の両側に、前記第１クッション層１２より軟らかい第２クッション層１３をそれぞれ配設し、前記クッション層１２，１３の上方に天板１４を載置する構成を採用する。これにより、点字ブロック１の天板１４に負荷がかかったとき天板１４に傾斜が生じ、点字ブロック１の上に安定して障害物を置くことが不可能となり、健常者へ注意を喚起させることができる。 
【選択図】図１
Patent JP-3917167-B1 (JP)
Title: プレファブ管の接続構造
IPC: F16L37/12
Filed: 2006-04-18
Granted: 2007-05-23
Abstract: 【課題】プレファブ工法やユニット工法等を用いて配管設備の形状・姿勢を保持しながら、その設置および取外し作業を効率的に行なうことが可能となるプレファブ管の接続構造を提供する。 【解決手段】筒状の第１プレファブ管本体１１Ａと該第１プレファブ管本体１１Ａの端部に設けられた拡径部１３とを有する第１プレファブ管１１と、一端部が拡径部１３に挿入される第２プレファブ管１２とを接続するプレファブ管の接続構造１０であって、第１プレファブ管本体１１Ａと拡径部１３との間に設けられたストッパー部１４と、第２プレファブ管１２の開口端部から離れた位置に形成された第１環状凹部１５と、シール部材１６と、拡径部１３の外周面上に周方向に延びる第２環状凹部１７と、第２環状凹部１７内に形成される。 【選択図】図４