baber/WOPTO huggingface dataset:
Patent KR-20190031712-A (KR)
Title: Planetary gear train of automatic transmission for vehicles
Inventor: KWON Hyun Sik
IPC: F16H3/66
Filed: 2017-09-18
Abstract: The present invention discloses a planetary gear train of an automatic transmission for a vehicle capable of improving power transmission performance and fuel efficiency by implementing forward 10 gear shifts. The planetary gear train of an automatic transmission for a vehicle according to an embodiment of the present invention includes: an input shaft for receiving torque from an engine; an output shaft for outputting the torque; a first planetary gear set having first, second, and third rotational elements; a second planetary gear set having fourth, fifth, and sixth rotational elements; a third planetary gear set having seventh, eighth, and ninth rotational elements; a fourth planetary gear set having tenth, eleventh, and twelfth rotational elements; a first shaft fixedly connected with the first rotational element and the fourth rotational element, and selectively connected with the input shaft; a second shaft fixedly connected with the sixth rotational element and selectively connected with the input shaft; a third shaft fixedly connected with the eighth rotational element and the eleventh rotational element and fixedly connected with the output shaft; a fourth shaft fixedly connected with the third rotational element and the seventh rotational element; a fifth shaft fixedly connected with the fifth rotational element, the ninth rotational element and the twelfth rotational element; and a plurality of shafts each selectively connecting a corresponding element to the transmission housing, the corresponding element being a rotational element of the first, third, and fourth planetary gear sets that is not fixedly interconnected.
Patent KR-20190035241-A (KR)
Title: Method of controlling a temperature of a chemical mechanical polishing (cmp) process, temperature control unit for performing the method, and cmp apparatus including the temperature control unit
Inventor: JEONG SUK HOON
IPC: H01L21/324
Filed: 2017-09-26
Abstract: According to a temperature control method of a chemical mechanical polishing (CMP) process, the temperature of at least two areas of a platen can be measured in real time during the process of CMP a substrate held on a polishing head with a polishing pad attached to the platen by using slurry and ultrapure water. Receiving feedback of the temperatures of the areas measured during the CMP process, the temperatures of the areas can be independently controlled in real time during the CMP process so that the temperature of the areas meet the set CMP process temeratures. Therefore, the CMP process temperature can be immediately given to all the areas of the platen, so that the polishing rate of each area of the substrate can be made uniform.
Patent KR-20190036859-A (KR)
Title: Pouch-Type Battery Case Comprising Metal Layer Having Concavo-convex Structure Surface
Inventor: HAN HYUNG SEOK
IPC: B32B27/32
Filed: 2017-09-28
Abstract: The present invention relates to a pouch-type battery case which is made of a laminated sheet and includes a structure of being sequentially stacked with an outer resin layer, a metal barrier layer and an inner sealing layer. An adhesive layer is further interposed on at least either one of between the outer resin layer and the metal barrier layer and between the metal barrier layer and the inner sealing layer. A concavo-convex structure is formed on at least one surface of the metal barrier layer.
Patent KR-20190036970-A (KR)
Title: Apparatus and Method for Automatic Setting Using Measurement of Electrical Impedance in Sensor Data Processing System
Inventor: KIM TAEOK
IPC: G01D3/02
Filed: 2017-09-28
Abstract: The present invention relates to an automatic setting device using a measured value of electric impedance in a sensor data processing system, capable of automatically setting operations by recognizing the state of a measurement target and the state of each sensor and cable and using the data stored in a database, and a method thereof. The automatic setting device includes: a probe information DB building part storing raw data, which are obtained from various frequencies through an impedance information extracting circuit in regard to combinations (Pn, Cm) of a random probe and an extension cable, in a database; an impedance information extracting part measuring the impedance of each of the combinations (Pn, Cm) of the probe and the extension cable in regard to every measurement frequency used for the probe information DB building part to make the probe information DB; a candidate model selecting part selecting the closest probe and cable model candidates by comparing a value of the probe information DB and a measured impedance value for each frequency; a final model selecting part selecting a plurality of selection candidates as final models from among the model candidates selected by the candidate model selecting part; and a selection model setting information providing part providing optimal setting information for the final models selected by the final model selecting part.
Patent KR-20190037467-A (KR)
Title: Odor and pest interception apparatus for sewage pipes
Inventor: SON YI HYUK
IPC: E03F5/04
Filed: 2017-09-29
Abstract: The present invention relates to an odor and pest blocking apparatus for a sewage pipe, which is mounted on the sewage pipe, into which domestic sewage or industrial water is discharged, to block an odor and a pest flowing backward from the sewage pipe, and more specifically, to an odor and pest blocking apparatus for a sewage pipe, which has a housing having an inner space through which sewage inflows and outflows and inserted and coupled to a hollow upper end of the sewage pipe, has a buoyancy body floated by a flow of the sewage and lowered by a weight in an inner space of the housing and inserted thereinto. Therefore, the buoyancy body opens the sewage pipe when the sewage is introduced into the inner space of the housing and closes the sewage pipe when the sewage isn′t introduced into the inner space of the housing, thereby being possible to block the odor and the pest of the sewage pipe from being introduced into an indoor space of a building.
Patent KR-20180040110-A (KR)
Inventor: KEMP BRIAN CHRISTOPHER
IPC: F02K9/95
Filed: 2017-10-11
Abstract: Provided are a system and a method for detecting an issue of a starter. According to one exemplary aspect of the present invention, provided is a method for detecting an anomaly of an air turbine starter. The method comprises a step of receiving data indicating a frequency associated with an integrated air turbine starter from one or more sensors located in a fixed part of the air turbine starter by one or more controllers to monitor a rotation part of the air turbine starter. The method comprises the step of determining an anomaly associated with an integrated air turbine starter by one or more controllers at least partially on the basis of data indicating the frequency. The method comprises a step of providing a notification indicating an anomaly associated with the integrated air turbine starter by one or more controllers.
Patent KR-20180043176-A (KR)
Inventor: EGASHIRA SHINICHI
IPC: H01L21/027
Filed: 2017-10-18
Abstract: The present invention provides a lithography device which is advantageous for correcting and speeding up of a best focus position of a projection optical system. The lithography device comprises: a detection part detecting a disk-side mark image and a substrate-side mark image through the projection optical system; and a control part. The detection part generates light field image data capable of refocusing which includes the disk-side mark image and the substrate-side mark image. The control part performs a refocus calculation reconfiguring a plurality of images having different focus directions based on the light field image data acquired from the detection part, and adjusts at least one position of a disk holding part and a substrate holding part based on the plurality of images reconfigured by the refocus calculation.
Patent KR-20170120542-A (KR)
Inventor: LEE YU RO
IPC: H04B7/0456
Filed: 2017-10-19
Abstract: 본 발명은 다중 사용자 무선 통신 시스템에서 전송 효율 향상을 위한 제어 및 훈련 심볼 전송 방법 및 장치에 대한 것이다. 
본 발명의 일 실시 예에 따른 방법은, 다중 사용자 무선 통신 시스템에서 제어 및 훈련 심볼 전송 방법으로, 동시에 서로 다른 데이터를 각 단말들로 전송할 시 각 데이터들의 요구 전송률이 각 단말들에서 채널 추정을 통해 만족할 수 있는지를 판단하는 과정과, 상기 판단 결과 각 데이터의 요구 전송률이 만족되지 않는 경우 상기 제어 및 훈련 심볼을 시간, 주파수, 코드 영역의 조합을 이용하여 단말별로 구분할 수 있도록 데이터 프레임을 구성하여 각 단말별로 전송하는 과정을 포함한다.
Patent KR-20190047262-A (KR)
Inventor: CHA YEON JAE
IPC: B65D51/00
Filed: 2017-10-27
Abstract: The present invention relates to a flexible tube type plastic bottle able to be sucked for drinking. The flexible tube type plastic bottle comprises: a plastic bottle (1) used by a user for drinking; a plastic bottle (2) using a flexible tube from the center of the plastic bottle (1) to the bottom; a cap (3) of the plastic bottle (1); a mouth part which is a part of the cap (3) coming into contact with the mouth of the user; and a rubber packing (5) preventing liquid from spilling from the inside of the cap (3). According to the present invention, since the volume of the plastic bottle becomes reduced as the amount of drink in the bottle becomes smaller, the bottle can be conveniently carried due to the reduced volume.
Patent KR-20190048550-A (KR)
Inventor: JUNG YOUNG BEOM
IPC: H02J7/35
Filed: 2017-10-31
Abstract: According to an embodiment of the present invention, disclosed are an underground monitoring system, a repeater for the same, and a sensor module for the same. According to an embodiment of the present invention, the underground monitoring system comprises: a first sensor unit generating sensing data, having a self-generating function, and emitting light for transmitting electric power; and a repeating unit receiving the light to generate electric power and wirelessly transmitting the sensing data.
Patent KR-20190050607-A (KR)
Inventor: LEE BYOUNG HOON
IPC: H01L29/772
Filed: 2017-11-03
Abstract: The present invention provides an integrated circuit device to achieve a first technical objective. The integrated circuit device comprises: a semiconductor substrate; a device isolation film defining an active region of the semiconductor substrate; a gate insulating film on the active region; a gate stack on the gate insulating film; a spacer on a sidewall of the gate stack; and an impurity region provided on both sides of the gate stack. The gate stack includes a metal carbide layer and a metal layer located on the metal carbide layer. The metal carbide layer includes a layer having a carbon content of 0.01 to 15 at%.
Patent KR-20190055507-A (KR)
Title: Laser Deposition Apparatus Having Abandoned Metal Powder Inhalation Unit
Inventor: BAEK GYEONG YUN
IPC: B33Y30/00
Filed: 2017-11-15
Abstract: According to the present invention, a laser deposition apparatus having an abandoned metal powder suction unit comprises: a powder supply unit supplying reinforcement powder to a reinforcing area of a target base material; a laser irradiation unit irradiating laser to the reinforcing area to which the reinforcement powder is supplied while moving along a predetermined movement route, and melting the base material and the reinforcement powder to form a reinforcing layer; and a suction unit collecting the abandoned metal powder generated while the reinforcing layer is formed by sucking the powder.
Patent KR-20190055542-A (KR)
Title: Method of Producing 2-hydroxy-gamma-butyrolactone
Inventor: PARK JI YOUNG
IPC: C12N9/00
Filed: 2017-11-15
Abstract: The present invention relates to a method for preparing 2-hydroxy-gamma-butyrolactone through a biosynthesis pathway and, more specifically, to a method for preparing 2-hydroxy-gamma-butyrolactone from 3-hydroxypropionic acid and formic acid using a recombinant microorganism. According to the present invention, 2-hydroxy-gamma-butyrolactone can be prepared from 3-hydroxypropionic acid and formic acid through a biosynthesis pathway using an enzyme.
Patent KR-20190060532-A (KR)
Title: Image compensating apparatus and method for performing light source compensation
Inventor: KYUNG WANG JUN
IPC: H04N9/64
Filed: 2017-11-24
Abstract: Disclosed are an apparatus and a method for correcting an image which can generate a consistent corrected image under various lighting conditions. The apparatus for correcting an image comprises: a correction coefficient auxiliary unit for generating a brightness image to be used for calculating a correction coefficient by using a brightness component of blurred images obtained from an input image; a correction coefficient calculating unit for calculating at least one correction coefficient by applying the generated brightness image to the blurred image; and a correction performing unit for reflecting the calculated correction coefficient on the input image to generate a corrected image.
Patent KR-20190061248-A (KR)
Title: Home pump dispenser
Inventor: SEO EUI SUK
IPC: B05B11/00
Filed: 2017-11-27
Abstract: The present invention relates to a home pump dispenser. More particularly, the present invention relates to a home pump dispenser for pushing down an upper push head part of the home pump dispenser several times to easily discharge and distribute a liquid material to the outside when the liquid material is distributed by discharging the liquid material from a container filled with the liquid material to the outside.
Patent KR-20180061043-A (KR)
Inventor: QIAN JUNCHENG
IPC: C25D11/06
Filed: 2017-11-28
Abstract: The present invention relates to a composition of a plasma electrolyzing oxidation (PEO) surface treatment solution for aluminum alloy products. The composition of a PEO surface treatment solution for aluminum alloy products is formed by mixing potassium hydroxide (KOH) of 1 to 35 parts by weight, sodium hydroxide (NaOH) of 1 to 20 parts by weight, ammonium hydroxide (NH4OH) of 1 to 10 parts by weight, potassium fluoride (KF) of 1 to 10 parts by weight, sodium fluoride (NaF) of 1 to 5 parts by weight, sodium pyrophosphate (Na4P2O7) of 1 to 5 parts by weight, and alumina (Al2O3) powder of 1 to 5 parts by weight in water with respect to water of 100 parts by weight. Therefore, the composition of a PEO surface treatment solution for aluminum alloy products can form a firm, compact and uniform oxide film on the surface of the aluminum alloy product since securing solidity and compactness of the film and forming pores of a fine size.
Patent KR-20190062858-A (KR)
Title: Method for manufacturing semiconductor device and semiconductor device
Inventor: SHIN CHANG HWAN
IPC: H01L29/78
Filed: 2017-11-29
Abstract: The present invention provides a semiconductor device to decrease leak current and a manufacturing method thereof. According to the present invention, the semiconductor device comprises: a finFET element including a gate electrode, a drain electrode, and a source electrode; and a selection element connected to the finFET element and having a switching layer and an electrode layer formed on a substrate. The switching layer includes lead zirconium titanate.
Patent KR-20190066211-A (KR)
Title: Wire rod rolling system and rolling method using the same
Inventor: SONG HWAN EUI
IPC: B21B39/20
Filed: 2017-12-05
Abstract: Disclosed are a wire rod rolling system and a rolling method using the same. According to an embodiment, the wire rod rolling system in which a plurality of oval rollers having an oval conformal roll are arranged comprises: a first twist guide device guiding a rolling material passing through the oval conformal roll to be twisted clockwise; and a second twist guide device guiding a rolling material passing through the oval conformal roll to be twisted counterclockwise. Moreover, a plurality of first and second twist guide devices may be alternately provided at an exit of each of the oval rollers.
Patent KR-20190068802-A (KR)
Title: 3D Display System and Method using Integral Imaging and holography
Inventor: HONG JI SOO
IPC: G02B30/10
Filed: 2017-12-11
Abstract: The present invention relates to a display system and a method thereof which plan to generate or provide an optimized three-dimensional (3D) image in which advantages of an integrated image display and a holography display are selectively combined, and can function as both an integrated image display and a holography display through time multiplexing. According to an embodiment of the present invention, the image display system comprises: liquid crystal (LC) which scatters or transmits incident light; a first spatial light modulator (SLM) which expresses image information; and a second SLM which produces white images or filter images. Therefore, the display system can function as both the integrated image display and the holography display through time multiplexing and thus, can generate or provide an optimized 3D image in which advantages of an integrated image display and a holography display are selectively combined.
Patent KR-20190069676-A (KR)
Title: One button self standing umbrella
Inventor: KANG SEOK JUN
IPC: A45B9/04
Filed: 2017-12-12
Abstract: The present invention relates to an umbrella which can stand by oneself with one button. The purpose of the present invention is to allow a user to stand an umbrella on the floor after generating a tripod by pressing one button. To achieve the purpose, the umbrella of the present invention has a structure which is inserted through the inside of a pipe (8) connected to a handle forming a main body, and comprises: a bent steel rod (5) which performs a role of a tripod; a button (1) which performs a role of a switch to change a shape; a sawtooth (2) which is attached to the button and performs a role of fixing a pipe (7) when the pipe connected to the sawtooth attached to the button moves down; a pipe (7) which is connected to the sawtooth attached to the button serving as a shaft of an internal component; a sawtooth (6) inside a handle which performs a role of fixing the sawtooth attached to the button; and a spring (4) which prevents the pipe (7) connected to the sawtooth attached to the button from moving down. In addition, the outside of the umbrella of the present invention is formed of a handle (3). According to the present invention, an end portion of the umbrella is changed to a tripod to stably stand, thereby securing space and preventing loss.
Patent KR-20190071269-A (KR)
Title: Polishing slurry composition for sti process
Inventor: KIM EUN OCK
IPC: C09G1/02
Filed: 2017-12-14
Abstract: The present invention relates to a polishing slurry composition for a shallow trench isolation (STI) process, which can reduce the occurrence of dishing in an oxide film field region. The polishing slurry composition for the STI process comprises: a slurry composition including abrasive particles and a dispersant; and an additive composition including a viscosity control agent containing a water soluble polysaccharide compound and a nitride film abrasive inhibitor containing an anionic polymer.
Patent KR-20190071874-A (KR)
Title: The system and method for intrusion tolerant system based on hybrid recovery
Inventor: KIM KANG SEOK
IPC: G06F21/55
Filed: 2017-12-15
Abstract: The present invention relates to a hybrid recovery-based intrusion tolerant system, which comprises: a recovery scheduling means managing a predefined time period for periodically recovering a virtual machine; an attack detection means detecting an attack on the virtual machine; and a central control means converting a virtual machine in an active state into a virtual machine in a ready state.
Patent KR-20190077898-A (KR)
Inventor: SONG JONG SEOB
IPC: G06Q10/06
Filed: 2017-12-26
Abstract: The present invention relates to an abnormal state monitoring system for management target facilities and, more specifically, to an abnormal state monitoring system for management target facilities which receives an abnormal state detection result of management target facilities such as various sorts of facilities and the like installed at a chemical plant, a power plant, or a civil engineering or construction site though various sensors, visualizes content related to the detection result as image information through a display unit, and monitors failure state information of the corresponding management target facilities, state information having a possibility of generating a future accident situation, and/or prediction lifetime information of the management target facilities through PdM based on a wireless sensor device and AR solution interlocking. In addition, the abnormal state monitoring system for management target facilities comprises a plurality of sensors, a server, and a display unit.
Patent KR-20170023078-A (KR)
Title: 통기성 필름 및 이를 편입한 물품
Inventor: WANG JIAN
IPC: C08J5/18
Filed: 2015-06-26
Abstract: 바람직한 특성을 가질 수 있는, 폴리에틸렌으로 형성된 통기성 필름이 제공된다. 일 측면에서, 통기성 필름은 제1 조성물을 포함하는 조성물로 형성된 층을 포함하고, 여기에서 제1 조성물은 적어도 하나의 에틸렌계 중합체를 포함하고 제1 조성물은 0.9 초과의 MWCDI 값, 및 하기 방정식: I10/I2 ≥≥ 7.0 - 1.2 x log (I2)를 충족시키는 용융 지수 비(I10/I2)를 포함한다.
Patent KR-20170019452-A (KR)
Title: 클러치 디스크 및 마찰 클러치 장치
Inventor: WELLER UWE
IPC: F16F15/14
Filed: 2015-05-12
Abstract: 본 발명은, 마찰 클러치 장치를 위한, 특히 내연 기관에 의해서 구동되는 차량의 파워 트레인을 위한 클러치 디스크(102)에 관한 것이며, 이 클러치 디스크(102)는 디스크 회전 축, 입력부(122), 하나 이상의 중간부(118) 및 출력부(116)를 구비하며, 이 경우 한 편으로는 입력부(122)와 하나 이상의 중간부(118)가 그리고 다른 한 편으로는 하나 이상의 중간부(118)와 출력부(116)가 서로에 대해 상대적으로 제한된 정도까지 비틀릴 수 있으며, 그리고 출력부(116)에 배치된 원심력 추 장치(115)를 구비하며, 이때 클러치 디스크(102)는 하부 부하 범위 및 상부 부하 범위를 갖는 특성 곡선을 갖고, 그 하부 부하 범위에서는 증가된 스프링 강성이 작용한다.  본 발명은 또한 특히 내연 기관에 의해서 구동되는 자동차의 파워 트레인을 위한 마찰 클러치 장치와도 관련이 있으며, 이 마찰 클러치 장치는 클러치 회전 축, 하우징, 하나 이상의 압력판, 작동을 위해 맞물린 작동 위치와 분리된 작동 위치 사이에서 압력판에 대해 상대적으로 제한된 정도까지 축 방향으로 이동할 수 있는 하나 이상의 접촉판, 및 마찰 결합 방식의 파워 전달을 위해 하나 이상의 압력판과 하나 이상의 접촉판 사이에 클램핑 될 수 있는 그와 같은 하나 이상의 클러치 디스크(102)를 구비한다.
Patent KR-20170035912-A (KR)
Inventor: WIDMER HANS PETER
IPC: G01R33/02
Filed: 2015-07-14
Abstract: 안내 및 정렬 시스템들이 송신기 및 수신기 유도 전력 전송 (IPT) 커플러들 정렬을 돕기 위해 무선 충전 시스템들에 대해 개시된다.     이들 시스템들은 송신기 및 수신기 IPT 커플러들 사이에 충분한 커플링을 제공하기 위해 포지셔닝 및 정렬을 안내한다.     예시적인 시스템들은 전기 차량 또는 무선 충전 베이스의 포지션을 결정하기 위해 자기장 센서, 자기장 생성기, 및 자기적 벡터링을 제공한다.     자기적 벡터링 시스템에서, 투자성 기판 상에 적어도 세 개의 코일들 (또는 유사한 회로들) 을 포함하는 정렬 시스템이, 변조된 정보 신호들을 포함하는 포지셔닝 자기장을 수신하고, 자기장 센서 포지션을 기준으로 포지셔닝 자기장 소스의 포지션을 결정하기 위한 출력을 생성하기 위해 수신된 신호를 프로세싱한다.     정렬 시스템은 입력 신호들에 기초하여, 변조된 정보 신호들을 포함할 수도 있는 포지셔닝 자기장을 생성하는 유사한 구조체를 더 포함할 수도 있다.
Patent KR-20170049500-A (KR)
Inventor: TIAN CHEN
IPC: H02J7/00
Filed: 2015-09-22
Abstract: 본 발명은 충전 제어 방법과 장치 및 전자 기기를 개시한다. 이는 차례로 직렬 연결된 충전 인터페이스, 충전 회로와 전지를 포함한 전자 기기에 적용되어, 전자 기기가 고압 충전 모드와 저압 충전 모드에서의 충전을 동시에 지원할 수 있도록 한다. 상기 방법은, 충전 장치가 상기 충전 인터페이스에 연결된 경우, 상기 충전 장치가 지원하는 충전 모드가 고압 충전 모드 또는 저압 충전 모드인지를 충전 제어 장치가 확정하는 단계를 포함하되, 그 중 상기 고압 충전 모드의 충전 전압은 상기 저압 충전 모드의 충전 전압보다 높고; 상기 충전 제어 장치가 상기 충전 장치가 지원하는 충전 모드에 의하여 상기 충전 회로를 제어하여, 상기 충전 회로가 상기 충전 장치가 지원하는 충전 모드로 상기 전지를 충전하도록 하는 단계를 포함한다.
Patent KR-20170033340-A (KR)
Inventor: VAN CUREN GREG
IPC: A63F13/26
Filed: 2015-08-07
Abstract: 본 발명은, 사용자가 실제 공간에서 실제로 이동하면 가상 공간 내에서 실재하여 이동하고 있는 느낌을 부여함으로써 가상 공간에의 몰입감과 실제 공간에서의 실제 이동을 양립시킬 수 있는 가상 현실 시스템 그리고, 이러한 가상 현실 시스템을 전투 훈련에 적용하여 사용자들이 아군과 적군으로 편을 나누어 실제 전투 훈련장이 아닌 실제 공간에서도 실제 전투 훈련장에서 전투를 하는 것과 같은 느낌을 부여함으로써 전투 훈련 효과를 극대화할 수 있는 전투 훈련 시스템이 개시된다.
Patent KR-20170028445-A (KR)
Inventor: VAN KRANENBURG RICHARD
IPC: C12N15/74
Filed: 2015-07-13
Abstract: 본 발명은 내인성 메틸글리옥살 신타제 유전자  mgsA 의 불활성화 또는 결실을 포함하는, 통성 혐기성이고 ( S )-락트산을 생산하는 유전자 조작된 호열성 세균 세포에 관한 것이다.
Patent KR-20170056518-A (KR)
Title: 발치 겸자
Inventor: IIDA KENICHI
IPC: A61C3/14
Filed: 2015-08-10
Abstract: 종래보다 작은 힘으로 치아를 확실하게 유지할 수 있는 것과 함께, 소형 경량화 및 치료에 필요한 갯수의 저감도 도모하는 것이 가능해지는 발치 겸자를 제공한다. 본 발명에 의하면, 한쌍의 겸자 부재(1)가 길이방향의 중간부에 있어서 추축(樞軸)(2)에 의해 회동 가능하게 연결되는 것에 의해, 추축(2)의 기단부측에 서로 접촉 분리 조작되는 파지부(3)가 형성되고, 추축(2)의 선단부측에 상기 접촉 분리 조작에 의해 개폐하여 치아를 협지하는 협지부(5)가 형성된 발치 겸자에 있어서, 한쌍의 협지부(5)의 대향면에, 각각 선단으로부터 상기 기단부측을 향해서 폭치수 및 대향면으로부터의 깊이 치수가 점차 작아지는 것에 의해, 대향면에 대한 가장자리부(6a)가 반원호형 또는 반타원호형을 이루는 오목부(6)를 형성했다.