baber/WOPTO huggingface dataset:
Patent KR-950008053-B1 (KR)
Title: Cleaning apparatus of engine cooling line
Inventor: BYUN MUN-HWAN
IPC: F01P3/00
Filed: 1993-12-03
Granted: 1995-07-24
Abstract: The apparatus for recycling the antifreeze liquid and cleaning the sludge accumulated in the engine cooling device, comprises rollers (11) for moving the body (100); a transparent tube (12) for measuring and filters (13)(14) mounted in front of the body; a T-line hose connecting device (15), a radiator hose connecting device (16), an air-line connecting device (25') mounted at the rigth side of the body; an antifreeze dispensing in let (17) connected with the inner tank and covered with the screen (18); a sample cock (19), an air regulator (20), a system pressure gauge (21), a filter pressure gauge (22), direction-turning valves (23)(24) with a lever mounted on the upper wall.
Patent KR-960009748-B1 (KR)
Title: Air fan
Inventor: AHN SOON-SUK
IPC: F16H13/02
Filed: 1993-12-13
Granted: 1996-07-24
Abstract: a cylindrical housing (20) with an upper plate (21); a middle support plate (22); a lower plate (23); a side plate (24); a rotary disk (60) with a driving motor (M); a cylindrical part (61) and a trident flange (62); a base bracket (80); a number of fan impeller shafts (100); a power transmission interruptive device (C); a clutch mechanism (40); a first crank mechanism (120); a stabilizer (130); a flat-shaped support plate (51) with a control switch (180) and a power connector (182); and a support rod (55) with a lower pipe (52) and an upper pipe (54).
Patent KR-970007934-B1 (KR)
Title: Preparing process of pear jam
Inventor: KWON YUN-JOO
IPC: A23L21/10
Filed: 1993-12-29
Granted: 1997-05-19
Abstract: To produce a flavorful pear jam with a good texture, select a fully ripe pears, wash them with the water of temperature of 8-10 degree C and remove the external material from the skin. Dry, peel, remove unnecessary parts  completely and crush the fruit body quickly, boil and condense them. If boiled in the vacuum kettle, damages from heat can be minimized. To this extract, add up 0.5-1.0 weight% of agar powder, 16-17weight% of sugar and stir it up, then heat for 3 hours, make them condensed with heat of 100-120 degree C and cooled off.
Patent KR-0158667-B1 (KR)
Inventor: MARCUS ILAN
IPC: D04H1/54
Filed: 1991-06-18
Granted: 1998-12-01
Abstract: 본 발명의 배치식 방법 및 장치는 부하 상태 섬유 및 결합제 섬유로 이루어진 섬유볼을, 바람직하게는 천공 주형내의 열기를 사용하여 섬유볼을 통해 공기를 순환시켜 성형 제품으로 성형하는 데 이용된다. 이러한 기술은 비교적 간단한 가요성 장치를 이용하여 지나친 폐기물 없이 다양한 형태 및 크기의 쿠션을 성형하는 데 특히 적합하다.
Patent KR-960004969-B1 (KR)
Inventor: YUN INN-BAE
IPC: A61B19/00
Filed: 1991-07-24
Granted: 1996-04-18
Abstract: 내용 없음.
Patent KR-0181979-B1 (KR)
Title: Liquid washing agents
Inventor: MEINE GEORG
IPC: C11D1/66
Filed: 1991-12-17
Granted: 1999-04-15
Abstract: PCT No. PCT/EP91/02428 Sec. 371 Date Jul. 28, 1993 Sec. 102(e) Date Jul. 28, 1993 PCT Filed Dec. 17, 1991 PCT Pub. No. WO92/13055 PCT Pub. Date Aug. 6, 1992A storable, high-viscosity liquid detergent having high washing power and pronounced foaming comprising water, and from about 2% to about 10% by weight of a fatty alcohol sulfate, from about 5% to 25% by weight of an alkyl polyglycoside; from about 0.1% to about 9% by weight of a soap; and from about 3% to 8% by weight of a lower alcohol, wherein said detergent has a viscosity of from about 500 mPa's to about 3000 mPa's.
Patent KR-100215016-B1 (KR)
Inventor: JOHLER J RALPH
IPC: G01S13/02
Filed: 1992-05-20
Granted: 1999-08-16
Abstract: 캐패시터(10)가 접지(130)와 직접 접촉하는 상태로 배치되어 있으며, 짧은 전압펄스는 넓은 주파수 대역을 갖는 전자방사 펄스를 상기 접지(130)내로 전송하도록 상기 캐패시터(10)에 인가되는 방법 및 장치가 개시되어 있다. 바람직한 실시예에서는, 지하 접지(130a,130b)를 통해 전파되어진 전자 방사 신호부분이 도면 번호(20)에서 검출되고 지하 접지 신호의 형상을 이루도록 처리된다. 전송용 캐패시터(10)의 사이즈(L)는 k가 접지내로 전송되는 접지층내에서의 방사신호의 각각의 주파수 성분에 대한 파수(wavenumber)인 경우에, Re[kL]1인 관계를 만족시킬 정도로 충분한 작아야 한다. 바람직한 실시예에서는, 상기 전송용 캐패시터(10)에 인가된 전압 펄스는 1MHz 이하로부터 100MHz 이상에 이르는 광대역의 주파수 성분, 및 대략 500kHz로 부터 25MHz에 이르는 범위의 주파수를 지니며 지하 접지신호의 형상을 이루도록 처리되는 검출된 전자방사신호의 유일한 주파수 성분을 지닌다.
Patent RO-118784-B1 (RO)
Title: Method and device for the directed transmission of information through fluid media and/or plasma using electromagnetic radiation
Inventor: MOAGĂR-POLADIAN GABRIEL
IPC: H04B10/00
Filed: 2001-04-09
Abstract: The invention relates to a method and device for the directed transmission of information through fluid media and/or plasma using electromagnetic radiation, from far infrared to the gamma-ray domain. According to the invention, the method is based on isolating the fluid propagation medium from the influences of the environment. A fluid propagation medium means a gas or a gaseous mixture (the pressure ranging between 100 at and 10^ -10 torr) as well as a liquid or a mixture of liquids. The propagation of electromagnetic radiation may also be considered to take place in vacuum or in plasma, in such cases, the isolation from the environment being absolutely necessary. The isolation is conceived so as to provide for the possibility of primary processing of the light beams which are propagating through the fluid propagation medium, in other words focusing on them, amplifying them, atenuating them, modifying the polarization state, their frequency, their phase, delaying them, separating them in more beams or merging more beams into a smaller number of beams.The device for the directed transmission of information through fluid media and/or plasma using electromagnetic radiation, uses the said method, the isolation being made by means of a rigid tube (1), provided with the necessary elements for controlling the propagation and the parameters of the electromagnetic radiation beams.
Patent RO-121640-B1 (RO)
Title: Propionic acid derivatives inhibiting integrins binding to receptors thereof, pharmaceutical composition containing the same and use thereof
Inventor: BIEDIGER RONALD J
IPC: A61P17/00
Filed: 2000-05-05
Abstract: The invention relates to propionic acid derivatives inhibiting the integrins binding to the receptors thereof, such as VCAM-1 (molecule of type 1 of vascular cellular adhesion) and fibronectin, to a pharmaceutical composition containing the same, as well as to the use of the mentioned derivatives for preparing a medicine for selective inhibition, in mammals, of alpha4beta1 integrin binding.
Patent RO-122234-B1 (RO)
Title: Method for matrix transformation of a mealy automaton into an equivalent moore automaton
Inventor: HRI CU ALIO A
IPC: G05B19/045
Filed: 2003-12-19
Abstract: The invention relates to a method for transforming a Mealy automaton, AMEALY, into an equivalent Moore automaton, AMOORE, used as an intermediary stage in obtaining the Mealy automaton in reduced form, which corresponds to the simplest practical achievement. According to the invention, the method forms the MMOORE connection matrix of the equivalent Moore automaton, AMOORE, from the connection matrix MMEALY of the Mealy automaton, AMEALY, the matrix transformation having the advantage that it is simply made, manually or programmed on a computer system, in only two stages, independently of the complexity of the Mealy automaton.
Patent RO-122043-B1 (RO)
Title: Process for waste neutralization
Inventor: PREDESCU IOANA
IPC: C10L5/14
Filed: 2005-10-07
Abstract: The invention relates to a process for neutralizing wastes resulting from the manufacturing of friction materials and products containing the same. According to the invention, the process consists in vigurously mixing a mixture made of 80% friction material waste and 20% industrial sawdust with the maximal grain diameter of less than 3 mm, then pressing the same in a briquetting press, at a pressure of about 150 atm., thereby resulting briquettes containing after the combustion up to 1.89% unburnt substances.
Patent RO-122587-B1 (RO)
Title: Asphalt composition
Inventor: VELEANU I FLOREA
IPC: C04B14/14
Filed: 2007-06-28
Abstract: The invention relates to an asphalt composition comprising, for 1000 kg of poured asphalt: 10...12% bitumen, 28% ground volcanic tuff having the following oxidic composition: 61.31% SiO2, 12.70% Al2O3, 3.40% Fe2O3, 5.67% CaO, 1.52% MgO, 2.30%K2O, 2.10% Na2O and 10.48% PC, as well as 60...62% river sand with a grain size of 0.4...0.5 mm, the percentage being expressed by weight.
Patent RO-123055-B1 (RO)
Title: O-ACYL-2-ETHYL-11-OXYIMINO-6,11-DIHYDRO-DIBENZ[b,e]OXEPINE DERIVATIVES, PHARMACEUTICAL COMPOSITION CONTAINING THE SAME AND USE THEREOF
Inventor: LIMBAN CARMEN
IPC: C07D313/12
Filed: 2009-02-24
Abstract: The invention relates to O-acyl-2-ethyl-11-oxyimino-6,11-dihydro-dibenzo[b,e]oxepine derivatives, whose structure is defined by the general formula I: where R is C1-C4 linear or C3-C4 branched alkyl, C1-C4 haloalkyl, C3-C6 cycloalkyl, C2-C4 alkenyl, C2-C4 alkinyl, phenyl, either non-substituted or mono- or poly-substituted with C1-C4 alkyl, C1-C3 alcoxy radicals, hydroxy, halogen, nitro, C1-C4 haloalkyl or N, S or O heterocyclic ring, and to the use thereof in the preparation of an antimicrobial medicament.
Patent RO-127915-B1 (RO)
Title: Non-invasive method and device for determining the airflow type on an airplane wing
Inventor: MICLOŞ SORIN
IPC: G01P5/26
Filed: 2011-04-07
Abstract: The invention relates to a non-invasive method and to an optoelectronic sensor device of DFB-FL-type for determining the airflow type on the leading edge of an airplane wing by measuring the amplitude variation and the frequency of the variable force corresponding to the static pressure and normally applied on the wing surface in a non-invasive manner and without affecting the characteristics of the wing material. The claimed method consists in using a DFB-FL laser emitter () pumped with a laser beam emitted by a laser diode and in determining the modifications of the output power of the DFB-FL laser emitter () induced by the non-linear variations of the refraction index of the optical fiber nucleus of the DFB-FL laser emitter () depending on the magnitude of the variable force characteristic to the normal static pressure of the air on the surface of the airplane wing. The claimed device for applying said method comprises a diode pump laser (), three fiber optic connectors (), a wavelength division multiplexer (), a DFB-FL laser emitter (), a photodiode (), an amplifier (), a data acquisition system () and a computer ().
Patent RO-128141-B1 (RO)
Title: Process for obtaining aromatic polyester-ether polyols from wastes of polyethylene terephthalate (pet) and aromatic polyester-ether polyols incorporating wastes of polyethylene terephthalate and regenerable materials obtained by the said process
Inventor: DULDNER MONICA-MIRELA
IPC: C08G65/30
Filed: 2011-06-23
Abstract: The present invention refers to an economical and ecological process for obtaining aromatic polyester-ether polyols suitable for rigid polyurethane foams formation, using as raw materials polyethylene terphthalate wastes and, in some alternatives, a material derived from biomass, consisting of: (1) glycolysis of polyethylene terephthalate wastes, resulted from soft-drink postconsuming bottles, with aliphatic polyols or polyoxyalkylene glycols with low molecular weights, in presence of transesterification catalysts; (2) partial esterification of aromatic polycarboxylic acids cyclic anhydrides with glycolysis products resulted from previous reaction stage (1), until the acid number reaches a particular value corresponding to a single carboxyl group full esterification (anhydride ring opening addition); (3) alcoxylation of the reaction mixture obtained in stage (2), up to a designed hydroxyl number, in presence of base catalysts (tertiary amines) and to an aromatic polyester-ether polyol obtained by some alternatives of the respective procedure, incorporating 20 - 30 % mol. moieties derived from PET wastes and 10-20% mol. moieties derived from isosorbide, and which can replace up to 30% wt. of the polyol component in rigid polyurethane foam formulations.
Patent RO-128207-B1 (RO)
Title: Plastering mortar for reinforcement and esthetic treatment of finish plastering and mural paintings support
Inventor: MOHANU ILEANA
IPC: C04B14/26
Filed: 2011-07-29
Abstract: The invention relates to a mortar meant for the treatment of gaps occurring within the plastering and support of the mural painting in historical monuments. According to the invention, the mortar comprises: 35...55% hydrated calcium lime, 20...35% volcanic tuff and 15...45% coloured limestone and river sand, at a lime-tuff-limestone : sand ratio of 1:1.17, the percentage being expressed by weight, a product with good mechanical strength and high resistance to freezing being obtained thereby.
Patent RO-130154-B1 (RO)
Title: Lamellar decanter
Inventor: MOGA IOANA CORINA
IPC: C02F1/52
Filed: 2013-10-07
Abstract: The invention relates to a lamellar decanter meant for a plant for purifying municipal and industrial waste water. According to the invention, the decanter comprises a functional compartment (1) and a sludge conveying installation (7), some sedimentation plates (2), and a sludge removal system (5), the functional compartment (1) being provided with two superposed chambers (I and II), to which a system (4) for supplying the waste water and chemical reagents is added, a detachable separation plate (6) being provided between the two chambers (I and II) where, in order to achieve a higher degree of purification of the waste water, an aeration system (8) is placed downstream the sedimentation plates (2) and upstream the water discharge.
Patent RS-54804-B1 (RS)
Inventor: VELJA STEFAN
IPC: A61F2/82
Filed: 2014-02-28
Abstract: Stent za hvatanje i razbijanje trombova, sa savitljivom plastičnom žicom (10), naznačen time, što je sastavljen iz plastične cevi (3) u koju su poprečno postavljene mrežice od Nitinola (7, 9) povezane sa pločicama (6j 8), koje su napravljene od kristala ili keramike i što su u plastičnu cev (3) prilikom izlivanja ugrađeni mikro čip (5) koji je sa elektro provodljivim žicama povezan sa pločicama (6, 8) i mikro čipom (4) koji je elektro provodljivom žicom povezan sa pločicom (1) od kristala ili keramike, koja obuhvata deo obima šupljine (2) za lek, pri čemu je mikro čip (5) programiran tako da piezoelektrični impuls sa pločice (6) generisan mikrodeformacijom mrežice (7) prosleđuje na mikro čip (4) samo kada detektuje mikrodeformaciju mrežice (7) u koju udara tromb, a ne prosleđuje ako istovremeno detektuje i mikrodeformaciju na mrežici (9), dok je mikro čip (4) koji prosleđuje električni impuls na pločicu (1), programiran za brojanje impulsa udara trombova i na osnovu spoljnje pobude šalje impuls čitaču o količini preostalog leka.
Patent RS-54602-B1 (RS)
Inventor: GREVE HARALD
IPC: A61P29/00
Filed: 2012-09-27
Abstract: Farmaceutska kompozicija u obliku određene doze za korišćenje u lokalnom lečenju zapaljenskih oboljenja usne duplje/ždrela, pri čemu je čvrsti dozni oblik tableta, dražeja, pilula ili čvrsta bombona i pri čemu farmaceutska kompozicija u kombinaciji sadrži(a) najmanje jednu sluznu drogu i/ili njen ekstrakt u relativnoj količini u opsegu između 0,1 do 25 težinskih procenata u odnosu na farmaceutsku kompoziciju; i(b) polidokanol kao lokalni anestetik u relativnoj količini u opsegu između 0,1 do 9 težinskih procenata u odnosu na farmaceutsku kompoziciju;pri čemu je sluzna droga odabrana iz islandskog lišaja (Lichen islandicus), belog sleza (Althaea officinalis L.), bokvice (Plantago lanceolata L.), crnog sleza (Malva sylvestris L. i M. Neglecta WALLR.), piskavice (Trigonella foenum-graecum L.) salepa i dunje (Cydonia oblonga MILL.) i njihovih kombinacija i pri čemu kompozicija sadrži (a) najmanje jednu sluznu drogu i /ili njen ekstrakt i (b) polidokanol u težinskom donosu od [(a): (b)] u opsegu 1:5do5:1.Prijava sadrži još 10 patentnih zahteva.
Patent SA-113340389-B1 (SA)
Title: Functionalization of graphene holes for deionization
Inventor: PETER V BEDWORTH
Filed: 2013-03-16
Abstract: A method for deionization of a solution, the method comprising functionalizing plural apertures of a graphene sheet to repel first ions in the solution from transiting through the functionalized plural apertures. The non-transiting first ions influence second ions in the solution to not transit through the functionalized plural apertures. The graphene sheet is positioned between a solution flow path input and a solution flow path output. Solution enters the solution flow path input and through the functionalized plural apertures of the graphene sheet, resulting in a deionized solution on the solution flow path output side of the graphene sheet and a second solution containing the first ions and second ions on the solution flow path input side of the graphene sheet.
Patent SA-116370784-B1 (SA)
Inventor: OLFAT MOHAMMAD ABDULLAH BARAYAN
Filed: 2016-07-21
Abstract: الاختراع عبارة عن لوح قابل للنقل مربوط الكترونيا بتطبيق على الجوال أو الكمبيوتر يستطيع من خلاله الشخص التحكم به وكتابة جميع ما يريد وتحديث المعلومات باستمرار على اللوح القابل للنقل. انظر الشكل ب
Patent SA-516371055-B1 (SA)
Title: Integrated fluid control valve and valve actuator assembly
Inventor: SU YANG
Filed: 2016-05-04
Abstract: Systems and methods of an integrated fluid control valve and valve actuator assembly are provided. The assembly includes a pressure operated fluid control valve for controlling the flow of liquid from a liquid supply piping system into a sprinkler piping system of a fire protection system when transitioning the fire protection system from a stand-by state to an actuated state. The control valve defines a valve chamber for holding a pressurized fluid to prevent the flow of fluid through the control valve. A valve actuator is coupled to the fluid control valve housing for setting of the fluid control valve in an unactuated ready state and for operating the fluid control valve automatically and/or manually. Automatic control devices can be placed in fluid communication with the valve actuator to maintain and control operation of the valve actuator for controlled operation of the fluid control valve.
Patent SA-516371061-B1 (SA)
Title: Automated workflow for 3D core digital modeling from computerized tomography scanner images
Inventor: MOKHLES MUSTAPHA MEZGHANI
Filed: 2016-05-04
Abstract: Computer-implemented methods, systems, and non-transitory computer-readable medium having computer program stored therein are provided to enhance the accuracy and efficiency of modeling a core sample from images of two-dimensional transverse sections of a core sample. Embodiments of the invention include, for example, image registering a plurality of images of transverse sections of a core sample to produce aligned transverse sections by approximating the circular location of the boundary of the transverse section and aligning the images based on center points of the approximated circles. Embodiments can further include, for example, performing a saw cut correction on the aligned transverse section images to adjust the images for the slab cut, generating a three-dimensional simulated model of the core sampling using or more of the saw cut line corrected images, and generating a three-dimensional simulated model of the internal composition of a borehole related to the core sample usin
Patent SA-516371655-B1 (SA)
Title: A Method of Forming a Catalyst Composition
Inventor: Alexander d todd
Filed: 2016-08-10
Abstract: Catalyst systems and methods for making and using the same. A method of methylating a catalyst composition while substantially normalizing the entiomeric distribution is provided. The method includes slurrying the organometallic compound in dimethoxyethane (DME), and adding a solution of RMgBr in DME, wherein R is a methyl group or a benzyl group, and wherein the RMgBr is greater than about 2.3 equivalents relative to the organometallic compound. After the addition of the RMgBr, the slurry is mixed for at least about four hours. An alkylated organometallic is isolated, wherein the methylated species has a meso / rac ratio that is between about 0.9 and about 1.2. Fig. 1
Patent SA-516380198-B1 (SA)
Title: Simultaneous analysis of multiple components in well fluids
Inventor: OLIVIER PORCHERIE
Filed: 2016-10-30
Abstract: The current application discloses methods and systems to analyze on-site and in real-time or quasi real-time the composition of the well fluid before or during use or disposition. The method is based on capillary electrophoresis (CE) and does not require the addition of tracers into the well fluid or additive. Based on the significance of each additive on the well fluid properties, it can be decided to determine the concentration of all additives or only one or a limited number of the additives present in the fluid, and the concentrations can be adjusted as needed to reach the desired target concentration(s). Fig. 1a
Patent SA-518391165-B1 (SA)
Title: MICROBIALLY INFLUENCED STEAM ASSISTED GRAVITY DRAINAGE (MiSAGD))
Inventor: HUBERT CASEY
Filed: 2018-03-22
Abstract: طريقة وجهاز لاستخلاص النفط من وحدات جيولوجية تتضمن نفط لا يمكن الوصول إليه حاليًا عن طريق تنشيط بنك البذور الميكروبية في المحيط الحيوي العميق. تسمح المواد الغذائية ودرجة حرارة الكائنات الدقيقة في وحدات جيولوجية تحتوي على النفط بتحفيز كائنات دقيقة غير نشطة أو ساكنة مثل تلك التي تتكاثر وتُنتج غاز. تسمح لزوجة النفط التي تقل بالحرارة، جنبًا إلى جنب مع ضغط الغاز الذي تم انتاجه بواسطة الميكروبات النشطة التي تزيد من حركة النفط، للنفط الذي كان من الصعب الوصول إليه سابقًا للتدفق ناحية آبار الانتاج.الشكل 1
Patent AU-2019200524-B1 (AU)
Title: Device for wave-like generation in an aquarium
Inventor: PETRO ALFRED
IPC: A01K63/00
Filed: 2019-01-25
Abstract: A water circulation system (1) to emulate a natural wave motion in an aquarium includes an electric pump (2) - having a water inlet (4) and two outlets (5,6) connected to a water distribution device (3) - having two outlets (10,11). Each 5 conduit (10,11) includes a ball valve (14,15) interconnected by a stepper motor (18). The discharge bores of the ball valves (14,15) are set orthogonal to each other. The ball valves (14,15) and stepper motor (18) are interconnected to provide substantially a 90 degree step rotation to each ball valve (14,15) when the stepper motor (18) is activated. The water circulation system (1) is controlled by 10 a wireless mobile application on a smart-phone.
Patent AU-2019201836-B1 (AU)
Title: A glasses case with a cleaning capability
Inventor: WANG LU
IPC: A45C11/04
Filed: 2019-03-15
Abstract: This invention discloses a glasses case with a cleaning capability, including a base 40, a seating cavity 39 opening upward, a spin-drying device 901, a glasses cover 10, locking devices 902, a cleaning cavity 11 opening downward and a release device 903 of longitudinal symmetry. The present invention is simple in structure. The cleansing solution is sprayed at the time of cleaning to achieve high-efficiency cleaning; in addition, based on a principle of centrifugal force, the cleansing solution in the glasses frame is spin-dried and blown dry by an encircling blower, thus ensuring that the glasses are clean and clear before the next use.
Patent EE-05131-B1 (EE)
Inventor: SOBOTTA RAINER
IPC: C07D491/04
Filed: 2002-02-09
Abstract: The invention relates to a method for purifying 20(S) camptothecin by transforming the lactone ring of the 20(S) camptothecin into a carboxylate salt with the help of an aqueous base, hydrogenating the mixture that is obtained in the presence of a transition metal catalyst, acidifying the aqueous phase to form camptothecin crystals, adding a polar aprotic solvent, optionally heating and cooling the mixture and separating the camptothecin crystals.
Patent WO-2004109724-B1 (WO)
Title: Composant electromecanique en metal doux et son procede de fabrication
Inventor: BERWALD THOMAS J
IPC: H01F3/04
Filed: 2004-06-02
Abstract: On forme une masse métallique magnétique tridimensionnelle propre au laminage en repliant un ruban métallique magnétique doux (10) jusqu'à obtenir une forme tridimensionnelle et en appliquant un adhésif à la forme tridimensionnelle. L'adhésif imprègne la forme tridimensionnelle et est ensuite durci. Si l'on forme un solide toroïdal (18) à partir de la masse métallique magnétique douce, on peut le transformer en un composant électromécanique (60). Le composant électromécanique serait alors utilisable dans des moteurs électriques de très haute fréquence.