baber/WOPTO huggingface dataset:
Patent KR-20030026637-A (KR)
Title: Exhaust system of pre-heater for vehicle
Inventor: KIM HYEONG TAE
IPC: B60H1/24
Filed: 2001-09-26
Abstract: PURPOSE: A system for exhaust of pre-heater for vehicle is provided to prevent inflow of foreign matters through an outlet of an exhaust port. CONSTITUTION: A pre-heater exhaust port(12) is installed on an exhaust gas outlet of a pre-heater unit(10) to discharge exhaust gas of the pre-heater unit to the outside of a vehicle. An electronic opening and closing device(20) is installed on an outlet of the pre-heater exhaust port to selectively open and close. The electronic opening and closing device is electrically connected to be supplied with working power simultaneously with the pre-heater unit to open and close depending on whether the pre-heater unit works or not so as to open the outlet of the exhaust port when the pre-heater unit works.
Patent KR-20010101849-A (KR)
Title: 보조 받침대를 구비한 김치 저장고
Inventor: SEO WAN SEOK
Filed: 2001-09-27
Abstract: 본 발명은 보조 받침대를 구비한 김치저장고에 관한 것으로, 본 발명은 케이스(2)의 상부에 도어(18)가 배치되는 김치저장고에 있어서, 상기 케이스(2) 상단의 안착부(2a)에는 지지대(47)가 구비되고, 상기 지지대(47)에는 힌지(48)에 의해 상기 도어(18)가 180°회동 가능하게 장착되며, 상기 도어(18)는 개방 시에 지지수단에 의해서 상기 케이스(2)의 외벽과 대략 90°의 각도로 배치되는 것을 특징으로 한다.
Patent KR-20030030214-A (KR)
Inventor: KIM JOONG HAN
IPC: G04B19/00
Filed: 2001-10-09
Abstract: PURPOSE: A dual time analog watch is provided to allow a user to easily recognize time of two different regions by simply coupling first and second hour hands, which indicate time of two different regions, to each other. CONSTITUTION: A dual time analog watch includes a time displaying panel(10), a driving section(20), a power transmission(30), a second hand assembly(41), a minute hand assembly(43), a first hour hand assembly(45), a one-way clutch(50), a second hour hand assembly(47), a time handling section(60) and a rotating section(70). The driving section(20) has an electric motor(21) and a gear(23) coupled to a rotating shaft(25) of the electric motor(21). The power transmission(30) includes a second hand power transmission(31), a minute hand power transmission(33), and an hour hand power transmission(35). The hour hand power transmission(35) includes a gear(35a), a pinion(35b), a shaft(35c) and a bevel gear(35d) installed between the gear(35a) and the pinion(35b).
Patent KR-20030030218-A (KR)
Title: signal converting system having level converter for use in high speed semiconductor device and method therefore
Inventor: CHO UK RAE
IPC: H03K5/06
Filed: 2001-10-09
Abstract: PURPOSE: A level converter is provided to be capable of minimizing performance lowering of a semiconductor chip and of increasing a level conversion speed. CONSTITUTION: A level converting part(110) outputs a level conversion signal(OUT) having a different level from a level of an input signal in response to a rising edge of the input signal(IN). A delay part(120) delays the level conversion signal(OUT) of the level converting part(110). A self reset part(130) generates a reset signal in response to the delayed level conversion signal. A pulse width of the level conversion signal(OUT) is established by a sum of the established delay and an internal operation delay, based on the reset signal.
Patent KR-20020032410-A (KR)
Inventor: DONG LITING
IPC: B01J29/70
Filed: 2001-10-26
Abstract: PURPOSE: A highly active midbarrel hydrocracking catalyst and the preparation thereof are provided to overcome the drawbacks of the prior catalysts and to develop a hydrocracking catalyst with a high activity and high yield to middle distillates. CONSTITUTION: The midbarrel hydrocracking catalyst with a zeolite, an amorphous silica-alumina and alumina as a support, Group VIII metal(s) and/or Group VIB metal(s) as active components comprises, on the basis of the catalyst weight, 4% to 28% of a modified zeolite-Y and 4% to 28% of a modified zeolite-β, wherein the zeolite-Y has a relative crystallinity of higher than 95%, a silica/alumina molar ratio of 9.0 to 30.6, an infrared acid of 0.30 to 0.90 mmol/g with more than 95% of Bronsted acid, a unit cell size of 24.25x10¬-10 m to 24.45x10¬-10 m, a Na2O weight content of less than 0.16 the modified zeolite-β has a silica/alumina molar ratio of 85 to 153, a Na2O weight content of less than 0.15%, a relative crystallinity of 100 to 110% and an infrared acid of 0.1 to 0.4 mmol/g. The process for preparing the hydrocracking catalyst comprises the steps of (a) mixing the defined amount of the modified zeolite-Y, the modified zeolite-β, optional amorphous silica-alumina and macroporous alumina, microporous alumina, and extrusion aid, forming by extrusion, and drying; (b) calcining the dried material of first step to yield the support; and (c) impregnating the support of the step (a) with an impregnation solution of the active Group VIII and/or Group VIB metal components, and then drying, calcining to yield the catalyst.
Patent KR-20020034966-A (KR)
Inventor: KOMATZU TAKASHI
IPC: H01J11/36
Filed: 2001-11-01
Abstract: PURPOSE: A plasma display and method for manufacturing the same is provided to obtain a flat electrode having a uniform film thickness and improved accuracy. CONSTITUTION: A plasma display comprises a pair of transparent substrates(20) opposed to each other; a plurality of barrier ribs(22) interposed between the substrates; a phosphor formed at each inner surface of a plurality of discharge cells formed by the barrier ribs; a terminal buffer layer(21) formed between barrier rib ends(22a) onto one of the transparent substrates; and a plurality of address electrodes(23) formed between barrier ribs and onto the terminal buffer layer. A method for manufacturing plasma display comprises a first step of forming a recess portion onto a transparent substrate, between the positions where a plurality of barrier ribs are to be formed; a second step of forming a terminal buffering layer on the recess portion corresponding to each end of barrier ribs; and a third step of forming a plurality of address electrodes on the recess portion and on the terminal buffering layer.
Patent KR-20030040840-A (KR)
Title: Method for manufacturing liquid crystal display device
Inventor: OH UI SEOK
IPC: G02F1/1339
Filed: 2001-11-16
Abstract: PURPOSE: A liquid crystal display device fabricating method is provided to keep the chemical stability of liquid crystal and reduce the time required for the joining of substrates, implanting of liquid crystal, and end sealing. CONSTITUTION: A liquid crystal display device fabricating method includes the steps of preparing a substrate for which sealing is finished, moving the substrate into a freezing chamber and freezing the substrate, moving the cooled substrate into a dehumidifier and dehumidifying the cooled substrate, moving the dehumidified substrate into a cooling chamber for implanting liquid crystal into the dehumidified substrate in the cooling chamber and joining the substrate with another substrate, and moving the joined substrates to a hot plate and curing the joined substrates.
Patent KR-20030045888-A (KR)
Title: Dual way display type liquid crystal display device
Inventor: HAN SANG HUN
IPC: G02F1/13357
Filed: 2001-12-03
Abstract: PURPOSE: A bidirectional display type liquid crystal display device is provided to establish component parts for providing light from a single light source to upper and lower display modules for simultaneous operation. CONSTITUTION: A bidirectional display type liquid crystal display device includes upper and lower display modules(1,2) disposed in pair for displaying different information, a plurality of bidirectional light sources(6) for supplying light rays of a predetermined intensity to the display modules, a light guide panel(3) disposed beside the light sources apart from them when securing the display modules to upper and lower surfaces, a scattering film(4) interposed between the light guide panel and the lower display module for scattering the light rays radiated from the light sources to reflect the light rays toward the upper display module, and a reflection/transmission sheet(5) interposed between the light guide panel and the lower display module for reflecting the light rays from the light sources to the upper display module partially and simultaneously transmitting the rest light rays toward the lower display module.
Patent KR-20030046838-A (KR)
Title: Repeater of base station using the beacon signal
Inventor: CHO SU GON
IPC: H04B7/155
Filed: 2001-12-06
Abstract: PURPOSE: A base station relay device using a beacon signal is provided to prevent that call disconnection is generated when a user moves from a 2.5G(Generation) system to a 2G system by outputting the beacon signal to the 2G system without passing a time corrector. CONSTITUTION: A beacon transceiver(100) generates a beacon signal to be used in a 2.5G system and a 2G system, and transmits and receives the beacon signal. A 2:1 divider(110) receives the beacon signal transmitted from the beacon transceiver(100), and divides the received beacon signal into the first and second beacon signals. A 2.5 relay processing device including a transmission signal combiner(120) and the first coupler(130) processes the first beacon signal divided by the 2:1 divider(110), and transmits the processed first beacon signal to a repeater. A 2G transmission processing device including a time corrector(140), the second coupler(150), and an LNA(Low Noise Amplifier)(160) processes the second beacon signal divided by the 2:1 divider(110), and transmits the processed second beacon signal to the 2G system.
Patent KR-20030052262-A (KR)
Title: Computer system and method of checking connection of network connector thereof
Inventor: KIM JEONG DAE
IPC: G01R31/00
Filed: 2001-12-11
Abstract: PURPOSE: A computer system and a method for checking a connection of a network connector thereof are provided to check a connection state of a network cable promptly and display the state in the case that the network cable is not connected to a network connector. CONSTITUTION: When a network cable is connected to a network connector(10), a signal processing unit(20) is electrically connected to the network connector(10) and receives a pulse signal form the network connector(10). The signal processing unit(20) converts the pulse signal into a digital signal having a high value greater than a predetermined power level, and applies the digital signal to a microcomputer(30). The microcomputer(30) is electrically connected to the signal processing unit(20). The microcomputer(30) receives the digital signal through a GPIO(General Purpose Input Output) port(31). If the received signal is a digital signal having a high value more than a predetermined level, the microcomputer(30) determines that the network connector(10) is connected.
Patent KR-20030049559-A (KR)
Title: Metal pallet
Inventor: HWANG CHEOL
IPC: B65D19/00
Filed: 2001-12-15
Abstract: PURPOSE: A metal pallet for loading is provided to satisfy the function required for a pallet and manufacture the pallet at a low cost. CONSTITUTION: A base plate(2) and four-way frames(6,8) are separated from each other. Supporting parts(15,18) having a prominence(28) on the bottom are formed on each corner of the base plate(2) by welding. A coupling groove(20) and a fixing pin(22) are formed inside the base plate(2). Several bearers(24,26) are projected on the bottom face. The left and right frames have a post(32) with a large width and some parts projected to the bottom so that the lower part of the post is inserted into the coupling groove of the base plate and vertically fixed. The front and rear frames(8) are formed with a fixing hole facing the fixing pin(22) of the base plate(2) on both sides of the bottom face, and both sides of the upper part are connected to joints by an axial pin so as to be connected with the left and right frames.
Patent KR-20020051834-A (KR)
Inventor: MIYAMOTO HIROFUMI
IPC: H01P1/205
Filed: 2001-12-18
Abstract: PURPOSE: A dielectric filter is provided to stably form an inner conductor at an inner circumferential face of a resonator hole with a sufficient film thickness. CONSTITUTION: Resonator holes(2a,2b) consisting of large diameter holes(22a,22b) and small diameter holes(23a,23b) penetrating through opposed faces(1a,1b) of the dielectric filter are formed on the dielectric filter(1). The small diameter holes(23a,23b) are formed on the face(1b) of the resonator holes(2a,2b). The large diameter holes(22a,22b) communicate with the small diameter holes(23a,23b) by deviating the axes of them to satisfy a relational expression R-r<P <R+r, where r is the radius of the small diameter holes(23a,23b), R is the radius of the large diameter holes(22a,22b), and P is an offset between the axis of the small diameter holes(23a,23b) and the axis of the large diameter holes(22a,22b). The large diameter holes(22a,22b) and the small diameter holes(23a,23b) are overlapped.
Patent KR-20030053231-A (KR)
Title: Permeable reactive barrier containing peat and remediation of contaminants in groundwater using the same
Inventor: SHIN WON SIK
IPC: C02F1/28
Filed: 2001-12-22
Abstract: PURPOSE: A remediation method of contaminants in groundwater using permeable reactive barrier containing peat is provided to purify groundwater by removing organic pollutants and heavy metals in the ground water with cheap materials. CONSTITUTION: The permeable reactive barrier is made of a Canadian Sphagnum Peat Moss Association which is a byproduct of a compost process with pressure in a box type case.
Patent KR-20030053772-A (KR)
Title: A method for manufacturing a high carbon wire having homegeneous tensile strength
Inventor: KIM HONG SU
IPC: B21B37/76
Filed: 2001-12-24
Abstract: PURPOSE: Provided is a method for manufacturing high carbon wire rod having homogenous profile tensile strength and excellent elongation by adjusting cooling pattern of wire rod in such a manner that temperature deviation between center part and edge part of a wire rod is minimized. CONSTITUTION: The method includes the steps of hot rolling a steel billet comprising C 0.60 to 0.80 wt.%, Si 0.01 to 0.30 wt.%, Mn 0.30 to 1.00 wt.%, 0.02 wt.% or less of P, 0.02 wt.% or less of S, a balance of Fe and incidental impurities into a steel wire; water cooling the steel wire to the temperature range of 830 to 880°C, followed by coiling; primary cooling of the steel wire coil to 650 deg.C, wherein cooling rate of center part of the steel wire coil is 5 to 10°C/sec and cooling rate of edge part of the steel wire coil is 20 to 30°C/sec; secondary cooling of the steel wire coil to 550 deg.C, wherein cooling rate of center part of the steel wire coil is 10 to 15°C/sec and cooling rate of edge part of the steel wire coil is 15 to 20°C/sec; and air cooling the cooled steel wire coil to room temperature.
Patent KR-20020025852-A (KR)
Inventor: LEE GONG HWAN
IPC: C04B28/02
Filed: 2001-12-28
Abstract: PURPOSE: Provided is a production method of artificial rock with strength and material like natural rock by forming rock-shaped silicon rubber mold and filling GRC mortar on the mold with a cement paste. The artificial rock is used for preventing destruction of nature and restoring damaged nature. CONSTITUTION: The artificial rock is produced by the following steps: preparing a GRC mortar by mixing 80kg of cement, 56kg of sand, 24-30kg of water, 2.4kg of glass fiber, 0.8kg of water-reducing agent, 2.4kg of polymer, 0.8kg of an agent for controlling whitening, and 2.4kg of pigment; preparing a cement paste by mixing 15kg of cement, 3kg of fine sand, 4.5-5.5kg of water, and 0.45 kg of pigment; reproducing rock by coating the rock with wax, and using silicon rubber; covering silicon rubber with fiber reinforced plastic(FRP); plastering the cement paste on the silicon rubber mold; filling the GRC mortar on the paste with removing foams; curing and de-molding the GRC mortar from the silicon rubber mold modifying holes on the GRC mortar with cement paste; spreading water on the GRC mortar to increase strength, and curing. The above pigment comprises Fe2O3, H2SiO4, Al2O3, CaCO3, and C for coloring dark brown, and Fe2O3, H2SiO4, Al2O3, and CaCO3 for coloring pale red.
Patent KR-20030058527-A (KR)
Title: Method for removing dust from underground railway and deluge appratus using the same
Inventor: YOO GIL SUB
IPC: E01H1/00
Filed: 2001-12-31
Abstract: PURPOSE: A water spray system with a dust removal device for a subway line is provided to reduce the maintenance cost for a subway by economizing in water by recycling waste water, and to remove the dust of a subway line economically and effectively. CONSTITUTION: The water spray system with a dust removal device for a subway line comprises a water tank collecting and storing underground water around a subway station building or the surrounding wall of a tunnel, a drainpipe connected with the water tank, a water spraying pipe(12) diverged from the drainpipe to be installed in a line along the surrounding wall(2) of a railway(1) and provided with many spraying holes, and a pump for spraying the underground water of the water tank to the spraying hole of the spraying pipe(12) through the drainpipe.
Patent KR-20010053486-A (KR)
IPC: B23K26/06
Filed: 1999-07-01
Abstract: An apparatus for the laser processing of workpieces with shortened processing time. Two laser units that can be simultaneously operated are directed towards each other. Workpieces, for example printed circuit boards, are moved between the two laser units such that the two sides of the workpieces are simultaneously processed. As a result the processing time is considerably shortened.
Patent KR-20010073155-A (KR)
Title: 사이클로펩티드 및 화학치료제 또는 혈관형성 저해제를함유하는 약학 제제
IPC: A61P29/00
Filed: 1999-09-09
Abstract: 본 발명은 사이클로(Arg-Gly-Asp-D-Phe-NMe-Val) 및/또는 하나의 이의 생리학적으로 허용가능한 염, 및 하나 이상의 화학치료제 및/또는 하나의 이의 생리학적으로 허용가능한 염, 및/또는 혈관형성 저해제 및/또는 하나의 이의 생리학적으로 허용가능한 염을 포함하는 약학 제제에 관한 것이다.
Patent KR-20010079851-A (KR)
Title: Method for producing cellulosic forms
IPC: D01F2/02
Filed: 1999-09-14
Abstract: Process for producing formed cellulosic articles, particularly fibers and filaments, comprising a) dissolving cellulose in an aqueous solution of a tertiary amine oxide, especially N-methyl-morpholine N-oxide, and b) extruding the cellulose solution through an extrusion die via an air gap into a precipitation bath with precipitation of the formed articles, said cellulose solution and/or said precipitation bath containing a tenside, characterized in that in the step b) the tenside content c of the cellulose solution and/or of the precipitation bath is in the range 100 ppm>c>5 ppm, and the width of the air gap is in the range from 2 to 20 mm. With this process the air gap width can be considerably reduced without deterioration of the properties of the fibers/filaments.
Patent KR-20010083948-A (KR)
IPC: H04M1/24
Filed: 1999-10-25
Abstract: 데이터 신호를 전송하기 위해 트위스트 페어 전송라인의 검정여부를 판정하는 방법 및 자동 테스트 시스템. 상기 방법은 트위스트 페어 전송라인의 위상불균형을 판정하는 단계를 포함한다. 위상 불균형은 트위스트 페어 전송라인내의 저항 불균형을 사용해서 판정된다. 저항 불균형은 공통 모드 전압을 전송라인에 인가하고; 인가된 공통 모드 전압에 응답해서 전송라인의 위상 불균형을 판정해서 판정된다. 상기 방법은 공통 모드 전압을 전송라인에 인가하는 단계; 인가된 공통 모드 전압에 응답해서, 전송라인의 위상불균형을 판정하는 단계; 판정된 위상에서 피크치를 검출하는 단계; 검출된 피크치의 주파수를 판정하는 단계; 판정된 주파수에 따라서 라인검정 여부를 판정하는 단계를 포함한다. 직렬저항 불균형 및 위상 측정결과를 사용해서, 데이터 전송을 불가능하게 하는, 트위스트 페어 전송라인에 존재하는 불균형의 타입을 발견하는 방법이 제공된다. 직렬저항 불균형 및 위상 측정 결과를 사용해서 불균형의 크기 및 불균형이 발생하는 위치를 판정하는 방법이 제공된다.
Patent KR-20010112265-A (KR)
Title: 노광방법 및 장치
IPC: G03F7/20
Filed: 2000-02-08
Abstract: 진공자외광과 같이 여러 가지 물질에 의해 흡수되기 쉬운 노광빔을 사용하는 경우에, 장치 전반의 기구를 복잡하게 하지 않고, 전사대상의 기판상에서의 노광빔의 조도를 높일 수 있는 노광방법이다.     조명광학계부 (5) 로부터의 노광빔으로서의 F 2 레이저광 (파장 157 nm) 에 의해, 레티클 조작부 (6) 중의 레티클 (R) 이 조명되고, 레티클 (R) 의 패턴의 이미지가 투영광학계를 통하여 웨이퍼 조작부 (7) 중의 웨이퍼 (W) 상에 전사된다.     조명광학계부 (5), 레티클 조작부 (6), 투영광학계 (PL) 및 웨이퍼 조작부 (7) 를 각각 조명계 챔버 (1), 레티클실 (2), 경통 (3) 및 웨이퍼실 (4) 로 밀폐하고, 이들 조명계 챔버 (1) ∼ 웨이퍼실 (4) 중의 광로상의 흡광물질의 농도를 서로 독립적으로 관리한다.
Patent KR-20010102149-A (KR)
Title: 차량 승객을 위한 자동 방호 시스템에 사용되는 액체모노추진제
IPC: C06B31/30
Filed: 2000-12-20
Abstract: 수용성 산화제 및 상기 산화제와 혼화성이 있는 수용성 유기 연료로 된 수용액을 포함하는, 차량 승객을 위한 자동 방호 시스템 (예를 들면, 에어 백)용 액체 모노추진제. 상기 산화제는 바람직하게는 질산 암모늄, 과산화수소 또는 질산이고, 상기 연료는 메탄올, 에탄올, 프로판올 또는 글리세롤 같은 저급 알콜이다. 액체 모노추진제는 약 0.90 이상의 산화율 (O r )을 갖는 것이 바람직하다.
Patent KR-20010102333-A (KR)
IPC: H03M7/42
Filed: 2000-01-17
Abstract: In a method for producing a data stream of code words of variable lengths which are divided up into a plurality of sets of code words, wherein a raster having segments is specified for the data stream, wherein two adjacent raster points define a segment, code words of the first sets are written into the data stream starting at raster points. Subsequently, code words of the second set are written into the data stream pursuant to a predetermined assignment rule, wherein each code word of the second set is assigned to a different segment. Entire code words or parts of code words which cannot be written according to their assignment, are stored and entered into the data stream in further attempts, wherein the assignment by a predetermined regulation is changed from attempt to attempt. This procedure is analogously repeated for any further set which may be present. Thus, the ends of code words of the second set are decoupled from the starts of following code words of the second set, since the corresponding code words of a set are written segment by segment, which results in a reduction of error propagation.
Patent KR-20020003572-A (KR)
Title: Ammoxidation of a mixture of ketones to acetonitrile and hydrogen cyanide
IPC: C01C3/02
Filed: 2000-05-16
Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.
Patent KR-20020028917-A (KR)
IPC: H05K1/03
Filed: 2001-05-01
Abstract: (a) 열경화성 수지 및 (b) 수산화 마그네슘 입자로 이루어지는 열경화성 수지 조성물로서, 이 수산화 마그네슘 입자는 하기 (i) 내지 (iv) 의 요건을 만족하는 것을 특징으로 하는 전기 및 전자 기기용 열가소성 수지 조성물. 
     (i) 레이저 회절산란법으로 측정된 평균 2 차 입자경이 0.5 내지 5 ㎛ 
     (ii) BET 법 비표면적이 0.1 내지 10 ㎡/g 
     (iii) Fe 화합물 및 Mn 화합물의 함유량의 합계량이 금속으로서 0.02 중량% 이하, 또한 
     (iv) U 화합물 및 Th 화합물의 함유량의 합계량이 금속으로 환산하여 10 ppb 이하 
     본 발명에 따르면 난연성, 내수성, 열전도성 및 내열성이 우수한 전기 및 전자 부품용 열경화성 수지 조성물이 제공된다.
Patent KR-20020024080-A (KR)
Inventor: KANG BAEK GU
IPC: B29B17/00
Filed: 2002-01-24
Abstract: PURPOSE: A method for regenerating a waste safety net made of polypropylene fiber is provided to attain an effect of material cost reduction, and to prevent the contamination of environment. CONSTITUTION: The method for regenerating a waste safety net of polypropylene fiber comprises steps of; pulverizing the waste safety net and removing impurities such as cement attached to the waste safety net; washing the pulverized net pieces by using a hot water shower method while agitating them in water of 110deg.C mixed with surfactant; cutting the washed pieces to a size of about 5 centimeters; secondarily washing the cut pieces by using the hot water shower method while agitating them in water of 110deg.C mixed with surfactant; and drying the washed pieces to extrude them into a chip for regenerating them into a raw thread form.
Patent KR-20030063973-A (KR)
Title: Composition of cement
Inventor: BAE SU HO
IPC: C04B18/14
Filed: 2002-01-25
Abstract: PURPOSE: A cement composition is provided, to improve the workability and the compression strength of cement and to reduce the manufacturing cost by employing a cheap blast furnace slag cement. CONSTITUTION: The cement composition comprises the cement source powder; and 50-70 wt% of the blast furnace slag cement powder. Preferably the cement composition comprises further 50-60 parts by weight of water, 500-600 parts by weight of aggregate and 0.2-0.5 parts by weight of a chemical admixture as a highly efficient water-reducing agent based on the total weight of the cement composition.