baber/WOPTO huggingface dataset:
Patent KR-20010077331-A (KR)
Title: Toilet bowl cleanser composition having deodorizing function
Inventor: KANG YEON HUI
IPC: C11D3/50
Filed: 2000-02-02
Abstract: PURPOSE: Provided is a detergent composition for a toilet bowl having an excellent odor removing function, which contains glyoxal and a metal complex as odor removing components. CONSTITUTION: The detergent composition for the toilet bowl comprises 0.1-10wt% of the glyoxal of formula 1, 0.1-20wt% of TiO2/Cu, Zn metal complex, 10-40wt% of a nonionic surfactant such as an alcohol phenol and an aliphatic alcohol, 10-20wt% of polyoxyethylene glycol and 10-30wt% of polyoxyethylene glycol derivatives as a solution controlling agent, 2-15wt% of a dye, 0.1-0.5wt% of a defoaming agent, and 0.3-5wt% of pine-oil as a perfume.
Patent KR-20010077603-A (KR)
Title: powder supply device
Inventor: KIM HAN SIK
IPC: B29C31/04
Filed: 2000-02-03
Abstract: PURPOSE: A quantitative powder supplier is provided to directly supply a mixture of pellet type resin and additives by automatically mixing and to uniformly measure the amount of supplied powder regardless of work sites. CONSTITUTION: A quantitative powder supplier automatically supplies powder to a material fed to a molding device. Agitating bars(22) and a powder supply disk(25) are installed in a hopper(20), and a powder supply channel(26) is formed along the upper edge of the powder supply disk. A part of the powder supply disk is protruded outwardly through the lower portion of the hopper, and a powder separating member is installed in the protruded part. The powder fed through the powder supply channel is transferred into a feed pipe(35) of a feed chamber(31) through an input port. A feed spring(33) is installed in the feed pipe. Thus, the powder is quantitatively fed to a mixing pipe(40). Additionally, a feed guiding shaft(37) is installed in the feed spring. Powder is accurately mixed with a material for extrusion, injection, and blow molding. Therefore, labor for injection work is reduced and production items are easily changed.
Patent KR-20000057959-A (KR)
Title: Method and system for inerting polymeric film producing machines
Inventor: DE WILDE ROBERT MARCEL
IPC: B29C48/92
Filed: 2000-02-08
Abstract: PURPOSE: A method and system for using laminar barrier inerting techniques to shroud a selected area in an open space covering the polymeric film outlet and/or raw material inlet with inert gas, are provided. CONSTITUTION: A method for producing polymeric film in a film making apparatus having a hopper inlet and an extruder outlet, comprises providing a portion of inert gas into an area covering said extruder outlet; passing raw polymers into said hopper inlet; and recovering a polymer film product from said extruder outlet.
Patent KR-20000024608-A (KR)
Title: Nonlinear inductor
Inventor: CHANG SEOK JU
IPC: H01F38/02
Filed: 2000-02-23
Abstract: PURPOSE: A nonlinear inductor is provided to reduce an unnecessary energy loss and to have an excellent shield capacity. CONSTITUTION: A nonlinear inductor comprises a first core which exists a magnetic saturation state at an initial state. A first coil is wound at a periphery of the first core so that a flux is maintained in a direction of canceling a flux of the first core. A permanent magnet is installed at the first core, and makes the first coil be the magnetic saturation state. A second coil is wound at a periphery of the first core so that a flux is maintained in a direction of canceling a flux by the first coil. A first diode is connected to the first coil in serial, is connected to a forward current flow of the first coil. A second diode is connected to the second coil in serial, is connected to a forward current flow of the second coil.
Patent KR-20000062662-A (KR)
Title: 회전 성형법용 안정화제 혼합물
IPC: C08K5/3492
Filed: 2000-02-28
Abstract: 폴리올레핀 중공 제품의 제조방법은 폴리올레핀을 유기 포스파이트 및 포스포나이트로 이루어진 그룹으로부터 선택된 하나 이상의 화합물(a), 하이드록실아민 유도체(i)와 아민 옥사이드 유도체(ii)로 이루어진 그룹으로부터 선택된 하나 이상의 화합물(b) 및 장애 아민 안정화제들로 이루어진 그룹으로부터 선택된 하나 이상의 화합물(c)을 포함하는 안정화제 혼합물로 충전시키고, 당해 혼합물을 금형에 충전시킨 다음, 금형을 오븐 속에서 280℃ 이상으로 가열하여, 안정화된 폴리올레핀을 용융시키고, 금형을 두 개 이상의 축들 둘레로 회전시켜 플라스틱 재료를 벽에 분산시킨 다음, 금형을 계속 회전시키면서 냉각시키고, 이어서 금형을 개방하여, 생성된 중공 제품을 취출(取出)함을 포함한다.
Patent KR-20000076752-A (KR)
Title: 멀티프로세서 데이타 처리 시스템에서의 캐쉬를 관리하는시스템과 방법
IPC: G06F12/08
Filed: 2000-02-29
Abstract: 메모리 캐쉬 시스템은 멀티프로세서 환경에서 사용된다.     제 1 프로세서는 제 1 레벨 1 캐쉬를 사용하여 데이타에 접근하고, 제 2 프로세서는 제 2 레벨 1 캐쉬를 사용하여 데이타에 접근한다.     기억 제어 회로는 제 1 및 제 2 레벨 1 캐쉬들, 레벨 2 캐쉬, 그리고 주 메모리 사이에 위치한다.     레벨 2 캐쉬는 주 기억장치의 데이타의 복사물들을 유지하고, 나아가 레벨 1 캐쉬들이 데이타의 복사물들을 갖는지와 복사물들이 변경되었는지의 표시를 유지한다.     프로세서가, 관련된 레벨 1 캐쉬 안에 상주하지 않는 데이타에 접근하면 요청이 이러한 데이타를 위하여 레벨 2 캐쉬에 전달된다.     그러면 레벨 2 캐쉬는 레벨 1 캐쉬로 데이타의 복사물을 반환할 수 있는지 또는 주 메모리로부터 데이타에 접근해야 하는지를 결정한다.     또한 레벨 2 캐쉬는 다른 레벨 1 캐쉬가 데이타의 변경된 복사물을 저장하고 있는 것으로 결정하면, 레벨 2 캐쉬는 기억 제어 회로 포인터를 데이타의 변경된 복사물을 갖고 있는 레벨 1 캐쉬로 반환한다.     그러면 기억 제어 회로는, 데이타의 변경된 복사물을 갖고 있는 레벨 1 캐쉬가 레벨 2 캐쉬나 주 메모리로의 데이타의 반환 없이 변경된 데이타를 레벨 1 캐쉬의 요청에 전달하는 결과가 된다.     이는 다중 프로세서들에 의한 동일한 데이타의 반복적인 쓰기(write)들의 결과를 개선시킨다.
Patent KR-20000062962-A (KR)
IPC: H04N5/91
Filed: 2000-03-20
Abstract: 본 발명은 데이터 스트림의 랜덤-액세스 포인트를 검출하기 위한 검출기 및 랜덤-액세스 포인트의 어드레스를 얻기 위한 장치를 포함하는, 하나 또는 그보다 많은 패킷화된 비디오 스트림으로 이루어진 데이터 스트림의 기록 장치에 관한 것이다.  어드레스를 포함하는 패킷은 패킷 식별 정보에 따라 구별된다.  어드레스 및 패킷 식별 정보를 포함하는 데이터 베이스가 작성된다.  이 데이터 베이스는 데이터 스트림으로부터 개별적으로 기록 매체 상에 기록된다.
Patent KR-20000063045-A (KR)
Title: 마스크 제조에서의 코너 라운딩 감소를 위한 장치 및 방법
IPC: H01L21/027
Filed: 2000-03-29
Abstract: 본 발명에 따른 마스크 패턴 제조 방법은 패터닝을 위한 마스크 블랭크(122)를 제공하는 단계; 상기 마스크 블랭크상에 연장된 축 및 상기 연장된 축의 반대 단부에 에지를 가지는 타원 단면 모양을 가지는 레이저/전자빔(120)을 전파하는 단계; 및 상기 마스크 블랭크상에 소정 패턴을 기입하기 위해 마스크 블랭크를 포지셔닝하는 단계를 포함하며, 상기 포지셔닝 단계는 상기 패턴의 코너(124)를 기입하기 위해 에너지 빔의 타원 단면 모양의 에지를 사용하는 것을 특징으로 한다.  또한 시스템이 포함된다.
Patent KR-20010096921-A (KR)
Inventor: YOON BONG SU
IPC: G06F17/00
Filed: 2000-04-19
Abstract: 본 발명은 도움말 제공 시스템 및 그 방법에 관한 것으로서, 소정의 캐릭터를 보여주는 디스플래이 상에서 상기 디스플래이 사용자에게 도움말을 제공하는 도움말 제공 방법에 있어서, 상기 소정의 캐릭터에 반응하는 보트를 생성하는 단계, 상기 디스플래이 사용자가 상기 디스플래이 이용 도중에 궁금한 사항이 발생할 경우 상기 보트를 호출하는 단계, 및 상기 보트가 상기 궁금한 사항에 적합한 도움말을 제공하는 단계를 구비하므로써 도움말을 파악하는 것이 편리할 뿐만 아니라 그에 따른 시간도 적게 걸린다.
Patent KR-20010100423-A (KR)
Inventor: PARK JUN KYU
Filed: 2000-05-02
Abstract: 실시간으로 경기 및 사이버 게임을 중계하고, 이와 동시에 게임에서의 배팅, 채팅 및 광고가 이루어질 수 있도록 된 서비스 제공 방법이 개시된다. 
     종래에 경기의 중계나 온라인 게임의 실행, 배팅, 채팅 등이 하나의 화면에서 구현되지 않음에 따라 사용자가 불편하게 되는 것을 해결하기 위하여, 통신을 통하여 웹 서버에 접속하는 단계와, 접속된 웹 서버에서 실시간 경기 중계, 게임 실행 및 중계, 배팅 및 채팅 등의 서비스를 선택하는 단계와, 상기 단계에서 선택된 실시간 경기 중계, 게임 실행 및 중계, 배팅 및 채팅 등의 서비스를 실행하는 단계 및 상기 단계에서 배팅을 행하는 경우 배팅에 대한 배당률에 따라 배당금을 지급하는 단계를 포함하는 통신상에서 실시간 경기 및 사이버 게임 중계, 배팅, 채팅, 광고를 제공하는 방법이 제공된다. 
     따라서, 통신상에서 사용자가 실시간으로 스포츠 경기 등을 시청하거나 스포츠 게임 등에 참여 및 관람하며, 다른 사용자들과 경기 및 게임에 대한 배팅을 하여 당첨되는 경우에는 배당금을 지급 받음과 동시에 채팅이 가능케 되며, 경기 및 게임의 관람 중에는 광고를 볼 수 있는 등의 복합적인 화면의 구성으로 사용자에게 편리성이 제공됨과 동시에 흥미에 따른 방문자의 증가로 광고 효과가 증대된다.
Patent KR-20010103424-A (KR)
Inventor: CHO TAE YEON
Filed: 2000-05-10
Abstract: 본 발명은 하나의 광원으로 로우빔과 하이빔을 조합해낼 수 있도록 한 자동차 전조등의 빔 전환장치에 관한 것으로서, 하우징(2) 저부의 안내홈을 따라 상하로 슬라이딩하는 차단판(8)을 하우징 일측에 축핀(18)으로 연결설치되고 또 스프링(20)이 일방향으로 탄력지지하는 연결대(12) 일단에 연결설치하고, 상기 연결대(12) 타단에는 피니언기어(22)를 연결형성하여 상기 피니언기어를 솔레노이드 (10)의 작동봉에 경사지게 형성된 랙기어(26)와 치합하여 솔레노이드(10)의 작동으로 차단판(8)이 상하작동하여 빔을 전환시켜 주도록 한 것이다.
Patent KR-20010107217-A (KR)
Inventor: YOON SUN GU
IPC: A01G31/02
Filed: 2000-05-26
Abstract: 본 발명은 콩나물 재배장치에 관한 것으로서, 소정의 타이머 수단 및 펌핑 수단 등을 이용하여 주기적으로 자동 급수가 이루어질 수 있도록 함으로써, 종전과 같이 수시로 물을 주어야 하는 번거로움을 해소할 수 있고, 또한 급수시설 내에 저장되어 있는 물에 살균작용을 하는 목초액 등을 섞어 줌으로써, 종전과 같이 인체에 유해한 성장 촉진제의 사용을 완전히 배제하면서 콩나물의 품질향상을 도모할 수 있으며, 이와 더불어 분수 및 조명수단을 추가로 채용함으로써,  콩나물을 재배하는 않는 경우에는 실내 장식효과도 기대할 수 있는 콩나물 재배장치를 제공하고자 한 것이다.
Patent KR-20000050240-A (KR)
Inventor: KIM HO KWANG
IPC: G06F17/24
Filed: 2000-05-30
Abstract: PURPOSE: A method and tools for restoration of deleted source code in programming is provided so that a programmer restore the deleted source code in programming by classifying the directory and its directory position in which stored before deleted with its information. CONSTITUTION: A method and tools for restoration of deleted source code in programming is provided so that a programmer shorten the re-programming time for the deleted source code by restoring the deleted source code in every input of the restore key for restoring. The method and the tools for deleting and restoring is consist of 4 steps. In the first step conforms whether the deleting key is input or not during the programming for users in program tool(1). In the second step, the deleted source codes are stored into the hard disk in every input of the restore key for restoring and the information for deleted data are stored into deleting database(2). The third step conforms whether the restoring key for deleting source code are input or not(3). The fourth step restore the deleted data into the restore unit when the deleting key is input by searching the deleted list in the deleted database(4).
Patent KR-20010014987-A (KR)
Inventor: TAKAHASHI HIROYUKI
IPC: H03K19/003
Filed: 2000-06-01
Abstract: PURPOSE: To prevent an output signal line from floating, caused by coupling capacity and to actualize fast operation and low power consumption by providing a means which prevents the potential of the output signal line from varying to the potential side of a 1st power source. CONSTITUTION: When output signal lines X0 and X2 vary from low a level to a high level, the output signal line X1 tries to raise itself by coupling capacitors Cc0 and Cc1. A small-amplitude driver circuit 12-1, however, is equipped with a P-channel MOS transistor(TR) 20 connected to an internal power line VR and this makes the TR tuned on, while the output signal line X1 is driven to high level, so that the output signal line X1 is connected to the internal power line VR. Consequently, the potential of the output signal line X1 varies only slightly, even if the output signal line X1 tries to raise itself through the coupling capacitors Cc0 and Cc1, and its variation is absorbed by the internal power source VR, so the potential of the output signal line X1 converges to the high level.
Patent KR-20000054499-A (KR)
Inventor: JANG WOONG
IPC: G06Q50/20
Filed: 2000-06-08
Abstract: PURPOSE: A cyber education method for writing magic letter and brush letter, that is, POP letter on internet is provided so that users may get systematic and effective education by connecting to the internet and connecting to a POP letter cyber education site and by providing the education in which users can study method for writing letter of desired step and providing teaching materials and VOD with which users can study POP letter systematically. CONSTITUTION: A cyber education method for writing magic letter and brush letter, that is, POP letter on internet includes several steps. A first step is to connect to POP letter cyber education site. A second step is to select step of study which is divided into 1-16 steps. A third step is to learn basic formula, which are subdivided into steps, in the selected step of study. A fourth step is to learn how to write POP letter watching presented sample style of handwriting. A fifth step is to produce a price table or poster based on practiced letter. A sixth step is to learn POP manufacturing process watching VOD.
Patent KR-20010112572-A (KR)
Title: The lifting device for tilting drum type washer
Inventor: LEE BONG SANG
IPC: D06F23/06
Filed: 2000-06-09
Abstract: Medicinal compositions against Helicobacter pylori, which contain as the active ingredient a 1- hydroxy-3-methyl-quinolone derivative represented by formula (I) or its pharmaceutically acceptable salt. Because of having an antibacterial effect on H. pylori, the above compound is useful in treating or preventing infection of human beings with H. pylori and infections of animals with bacteria belonging to the genus Helicobacter in relation thereto. The above compositions are useful in the prevention (including the prevention of recurrence) and treatment of peptic ulcers (gastric ulcer, duodenal ulcer, etc.), inflammations (acute or chronic gastritis or duodenitis), diseases in the upper part of the digestive tract (gastric cancer, etc.), mucosa-associated lymphoid tissue (MALT) lymphoma, chronic heart diseases, etc.
Patent KR-20010113159-A (KR)
Inventor: SHIN TAE HO
IPC: H01J11/44
Filed: 2000-06-16
Abstract: 본 발명은 플라즈마 표시패널(plasma display panel,  PDP)에 관한 것으로서, 전면기판 상에 형성되는 블랙 스트라이프층, 버스전극 및 상기 블랙 스트라이프층과 버스전극 상의 유전체막을 보호하는 반사막을 형성하여 방전 시 형광체에서 방출되는 가시광을 반사시킴으로써 패널의 휘도 및 효율을 향상시키고, 색온도를 향상시킬 수 있는 기술이다.
Patent KR-20010049669-A (KR)
Inventor: ABUAF NESIM
IPC: B22C9/22
Filed: 2000-06-29
Abstract: PURPOSE: A turbine engine component is provided to improve heat transfer of a turbine engine component having treated surface using turbulation. CONSTITUTION: A turbine engine component(10) is provided that has a surface with a plurality of depressions, which is effective to increase the surface area. The depressions are generally concave in contour and improve the heat transfer characteristics of the component. A method of manufacturing a turbine engine part is also disclosed.
Patent KR-20020002140-A (KR)
Title: Tetra twister
Inventor: KANG JAE DO
IPC: D07B3/10
Filed: 2000-06-29
Abstract: PURPOSE: A tetra braiding machine is provided, which is characterized by forming various twist structures of the respective steel cords, increasing braiding speed and improving productivity of steel cord by convert of rotating direction and speed of an internal face disc and an external face disc. CONSTITUTION: The tetra braiding machine is comprised of: a bed frame(31); two posts(32) installed on both ends of the bed frame; a bracket(33A) attached to the outside of the one post; a driving motor(33) installed on the bracket; a main rotary axis(34) delivering rotatory force of the driving motor to a rotary axis(35) of a pair of external face disc(36); the rotary axis(35) rotated by the main rotary axis(34); a connecting part perforated into the internal face disc and the external face disc; two rotating and speed converting parts(37) installed on the connecting part; a rotary axis(38) of the internal face disc connected to the same axis as the rotary axis of the external face disc and a bearing; a pair of internal face disc(39) perforated and inserted by the rotary axis(38) of the internal face disc; and a cradle(30) installed between one end of the rotary axis(38) and installed many guide rollers(30A).
Patent KR-20020005236-A (KR)
Title: mobile guidance device
Inventor: OH YEONG TAEK
IPC: H04H20/00
Filed: 2000-07-01
Abstract: PURPOSE: A mobile announcement apparatus is provided to allow a user to listen to announcement information on an announcement object by previously storing the announcement information in a memory unit and receive the announcement in occurrence of an emergency. CONSTITUTION: An area ID receiving unit(20) receives an area ID which has been transmitted from an area ID transmitter(10). The area ID transmitter(10) is positioned in the vicinity of an announcement object, transmits a signal and forms an announcement area(210) of a local part. The area ID signal transmitted from the area ID transmitter(10) is transmitted to the area ID receiving unit(20) by using a radio signal. An area ID extracting unit(22) extracts an area ID signal received by the area ID receiving unit(20) and demodulates the signal. An announcement information selecting unit(24) selects announcement information by using the area ID extracted by the area ID extracting unit(22). An announcement storing unit(26) compresses, converts and stores the announcement information. A reproducing unit(28) reproduces voice and image announcement information selected from the announcement information storing unit(26) by the announcement selecting unit(24). A reproduction controller(56) controls a reproduction method of a voice signal reproduced by the reproducing unit(28). A voice output unit(30) converts the voice signal reproduced by the reproducing unit(28) into an audible frequency that can be available for a user's listening to it. An image output unit(32) displays the image signal reproduced by the reproducing unit(28) as an image for a user's viewing. An announcement transmitter(40) includes a voice input unit(42) for inputting an announcement content and a voice transmitter for modulating the voice signal and converting it to a radio signal and transmitting the radio signal. A voice receiver(44) receives and demodulates a voice announcement signal transmitted from the announcement transmitter(40) and converts it into a voice signal. When a voice signal is detected by the voice receiver(44), an output controller(46) transmits the voice signal to the voice output unit(30).
Patent KR-20020004739-A (KR)
Title: a washing machine and method for providing a program to the same
Inventor: CHO SEONG JIN
IPC: D06F33/02
Filed: 2000-07-07
Abstract: PURPOSE: A washing machine and a program providing method are provided to use a program proper to the life environment of a user downloading from the network. CONSTITUTION: A washing machine comprises: a key signal input unit(1) for inputting commands for performing washing, downloading a program and operating the program downloaded; a water level sensing unit(2) for sensing the level of the washing water; a water supply valve drive unit(3) for driving a water supply valve with response to a control signal; a drain valve drive unit(4) for driving a drain valve with response to a control signal; a motor drive unit(5) for driving a washing motor with response to a control signal; a display unit(6) for displaying the operating state of a washing machine and the generation of an error; a control unit(7) for outputting control signals to the drive units; and a downloading unit(8) for saving a new program in the control unit. Therefore, a washing machine is used efficiently.
Patent KR-20020015211-A (KR)
Title: Remote education system for business
Inventor: LEE SEUNG HO
Filed: 2000-08-21
Abstract: PURPOSE: An international business and a remote education system for company cooperative business are provided to conveniently offer a chance of education through the remote Internet to everyone wanting a methodology of the international business and the company cooperative business. CONSTITUTION: The system comprises an education client including a student, a scholar and a business man willing to study the international business and the company cooperative business, an international business information providing server providing a selected lecture to a client in case of the client requests the lecture on the international business and the company cooperative business, an international region information expert group supporting the international business information providing server with the information about an export outlet development, a technical licensing, an introduction of foreign capital, a strategic join and an outsourcing project, and a cooperative company group supporting the international business information providing server with collecting the information about a cooperative outlet development, a joint venture and a technical cooperation between a venture company and an oversea similar company.
Patent KR-20020016347-A (KR)
Inventor: KIM RYONG DUCK
IPC: A61G7/00
Filed: 2000-08-25
Abstract: PURPOSE: A bed for a patient is provided to prevent an abscess on the back of a patient by changing position of the patient laid on the bed for a long time, and to improve convenience by operating easily with simple structure. CONSTITUTION: A bed for a patient comprises a main frame member(10); a sub frame member(20) connected to the side of the main frame member; a first bed(30) lifted horizontally in the main frame member; a second bed formed vertically at the side of the first bed and lifted; a first driving unit(50) moving up and down the first bed along a first guide rail; a second driving unit sliding up and down the second bed along a second guide rail(14); and a turning unit(70) turning the first bed and the second bed at the same time. The position of the patient is changed frequently with operating conveniently by controlling automatically. The abscess on the back of the patient is prevented, and burden of nursing is relieved.
Patent KR-20020017145-A (KR)
Title: Car wiper automatic lift system
Inventor: CHO KWANG HO
IPC: B60S1/32
Filed: 2000-08-29
Abstract: PURPOSE: An automatic wiper lifting apparatus of a vehicle is provided to protect a rubber blade of a wiper, and to travel safely by lifting a wiper arm from a windshield in not operating the wiper, and by contacting the wiper to the windshield in operating the wiper. CONSTITUTION: An operating body(1) is assembled with the side of a wiper arm(18), and a piston is supported with a piston spring. A guide hole is formed vertically in the piston spring, and a push spring(10) is inserted to the guide hole. The push spring is connected to the piston by a piston rod. Fluid is charged in the operating body, and the operating body is sealed with a spring cap and a finishing cap. The piston rod is connected to a fixing bracket(12) and a tension wire(11). The piston is moved right and left, and the push spring is input and output with turning the wiper arm. The wire arm is lifted up with the push spring. A wiper rubber blade(16) is separated from a windshield with automatically lifting up the wiper arm in stopping the wiper. Performance is improved with protecting the rubber blade of the wiper.
Patent KR-20020022847-A (KR)
Title: A manufacturing process of ultra-granule tungsten carbide dust by soppy system mixing
Inventor: LEE TAE JIN
IPC: C01B32/949
Filed: 2000-09-21
Abstract: PURPOSE: A process of fabricating tungsten carbide particle by wet mixing is provided to prepare ultrafine tungsten carbide particle without performing milling and forming operation, which are essential in conventional dry-mixing process. CONSTITUTION: The process of fabricating ultrafine tungsten carbide particle through wet mixing includes the steps of (i) adding either particular tungsten compound(CaWO4, APT-Ammonium Para Tungstate) or tungsten-containing solution such as Na2WO4 and (NH)4WO4 into 1.5-2.0 equivalent of inorganic acid solution so as to prepare tungsten acid(H2WO4); (ii) wet-mixing of the tungsten slurry with carbon wherein the amount of carbon to be added is 2.5-4.5 equivalence based on the WO3 content and distilled water is added to slurry at a volume ratio of 1 : 0.3-1.5; and (iii) drying the resultant mixture of the 2nd step under a vacuum atmosphere of 900 to 120 0°C followed by drying it under hydrogen atmosphere of 1200 to 1600°C.
Patent KR-20020024912-A (KR)
Title: Method of construct a tunnel
Inventor: GO SOON BANG
IPC: E21D9/00
Filed: 2000-09-27
Abstract: PURPOSE: A continuous long benching method of a large-sized tunnel is provided to execute excavation works for a hanging wall and a floor wall of a large-sized tunnel simultaneously, to reduce the period of construction and to maximize the efficiency of equipment and manpower. CONSTITUTION: In a tunneling work by judging the grade of bedrock, blasting by boring and charging with gunpowder, disposing of muck, placing shotcrete and installing a lock bolt, the continuous long benching method of a large-sized tunnel comprises the steps of: excavating a hanging wall to a depth of 70-120 meters, then reinforcing and constructing; proceeding a work for the hanging wall continuously, constructing a conveyance route by selecting one side of right and left sides, excavating a half section of a floor wall to a depth of 15 meters, then reinforcing and constructing; and proceeding a work for the hanging wall continuously, constructing a conveyance route toward the front of the excavated half section of the floor wall, removing the remaining conveyance route, and excavating the half section of the floor wall to a depth of 15 meters toward the front of the conveyance route.