baber/WOPTO huggingface dataset:
Patent KR-20110137688-A (KR)
Title: A drilling machine
Inventor: LEE JONG KYU
IPC: E21B19/24
Filed: 2010-06-17
Abstract: PURPOSE: A drill is provided to correct the eccentricity between the central part of a rod and a hole and enable a casing to be installed on a drill hole rapidly and easily. CONSTITUTION: A drill comprises a body, a rod clamp, a rotating frame, a reader, an auger, a first horizontal transfer unit(190), and a second horizontal transfer unit(200). The body comprises a lower frame and an upper frame(120). The rod clamp is slidably coupled to the cut part of the upper frame. The rotating frame is rotatably coupled to one side of the upper part of the body. The reader is liftably installed in the length direction of the rotating frame. The auger is coupled to one side of the reader and lifts along the reader. The first horizontal transfer unit horizontally transfers the rod clamp coupled to the cut part of the upper frame.
Patent KR-20110140057-A (KR)
Title: Optimum path setup method of synchronization based city-wide prt
Inventor: KIM DONG HEE
IPC: H04L12/28
Filed: 2010-06-24
Abstract: PURPOSE: An optimized route establishment method of a city-wide personal rapid transit based on synchronization is provided to reduce the waiting time of passengers by determining optimized paths and a vehicle input point. CONSTITUTION: All candidate paths are searched between a destination and a starting point(S12). The searched all candidate paths are calculated about distance costs and the candidate path(S14). The vehicle input point is calculated about the searched all candidate paths(S18). The optimized path is determined considering of the distance cost and the vehicle input point(S20).
Patent KR-20120001449-A (KR)
Title: Manicure
Inventor: CHOI YONG SUN
IPC: A45D34/04
Filed: 2010-06-29
Abstract: PURPOSE: Manicure is provided to facilitate the carrying and keeping thereof and to make replacement of related parts convenient. CONSTITUTION: Manicure comprises: a container body(1) which contains manicure liquid; a first lid(2) which is combined with an opening(100) of a container upper body; a brush assembly(3) which is installed through a penetration hole formed in the first lid; a buffer(4) which is detachably fixed to the first lid; and a second lid(5) which is combined with the outside of the first lid.
Patent KR-20120002053-A (KR)
Title: Anticaking agent made of rice fiber extracted from defatted rice bran
Inventor: PARK JIN HEE
IPC: A23L7/10
Filed: 2010-06-30
Abstract: PURPOSE: An anti-caking agent is provided to replace a conventional inorganic anti-caking agent, and to offer the excellent anti-caking function by being mixed with food additives. CONSTITUTION: An anti-caking agent contains 0.1-10% of rice dietary fibers extracted from defatted rice bran. The anti-caking agent is obtained by the following steps: producing rice bran pellets using rice bran; removing fat from the rice bran pellets to obtain defatted rice bran; extracting protein from the defatted rice bran to obtain the rice dietary fibers; milling the rice dietary fibers before roasting; and finely crushing the roasted rice dietary fibers.
Patent KR-20120003600-A (KR)
Title: 동력분할식 무단변속기
Inventor: KWON SUNG TAE
IPC: F16H3/76
Filed: 2010-07-05
Abstract: 본 발명은 자동차, 이륜차, 건설기기 등에 사용되는 변속기에 관한 것으로서 특히 기어가 상시적으로 맞물려 있는 상태에서 연속적인 변속이 가능하고 저속주행과 고속주행의 변속폭이 넓어서 기존의 변속기보다 자동차나 이륜차가 부드러운 주행을 할 수 있고 연비와 가속성이 향상되도록 하며 변속이 이루어지는 가변 클러치에서 주행중에 발생하는 충격을 흡수하여 엔진의 마모나 손상을 방지하는 무단 변속기에 관한 것이다. 
     이에 본 발명은 금속밸트가 가진 강도의 한계성으로 인해서 고출력 기관에는 사용이 불가능하고 또한 금속밸트와 폴리간의 슬립현상으로 인한 동력 손실, 소음, 마모 등으로 인한 수명의 한계성을 극복하고자 링기어, 캐리어, 선기어로 구성된 입력측 유성기어셋트와 출력측 유성기어셋트를 구비하여 입력측 유성기어셋트에 구비된 링기어, 캐리어, 선기어 3개의 유닛중 한 유닛으로부터 동력을 전달받고 나머지 2개의 유닛을 출력측 유성기어셋트의 링기어, 캐리어 선기어중에 선택적으로 2개의 유닛에 각각 연결하며 나머지 하나의 유닛은 동력을 출력하도록 구성한다. 다음으로 입력측 유성기어셋트와 출력측 유성기어셋트를 연결한 두쌍의 유닛들의 회전수를 달리하기 위해서 한 쌍의 유닛에 증속기어샛트나 감속기어셋트를 설치하고 이 두쌍의 유닛을 연결력을 조절할 수 있는 가변클러치와 연결하여 가변클러치의 연결력을 조절하면 그에 따라 변속이 이루어진다. 이를 통해서 기존의 무단변속기가 가지고 있던 수명의 한계성과 동력 손실을 최소화 할 수 있으며 기존의 무단 변 속기의 5～7배보다 훨씬 더 넓은 기어비를 가능하게 하여 차량이 출발할때 낮은 기어비로 부드럽고 빠른 증속을 할 수 있으며 높은 기어비로 기관의 최종속도를 높일 수 있다. 또한 유성기어셋트의 유닛을 제어하기 위해서 다수의 클러치와 브레이크가 필요했던 기존의 자동변속기보다 제조 단가를 낮출 수 있다. 
       
     입력측 유성기어셋트, 출력측 유성기어셋트, 가변클러치, 전자 클러치, 전자 파우더 클러치, 증속기어, 감속기어
Patent KR-20120004849-A (KR)
Title: Method for fabricating semiconductor device
Inventor: LEE JIN HO
IPC: H01L21/31
Filed: 2010-07-07
Abstract: PURPOSE: A method for fabricating a semiconductor device is provided to prevent the deterioration of a formed pattern in filling an insulating film by forming the insulating film under 400°C. CONSTITUTION: A wafer(11) having a plurality of patterns(12) thereon is formed on the bottom electrode in a chamber. A deposition gas and an etching gas are implanted into a chamber to form plasma. A bias is supplied to the bottom electrode to form an insulating film filling a plurality of patterns. An argon gas, helium gas, and hydrogen gas are inserted into the chamber in order. A bias supplied to the bottom electrode is within 4000W - 5000W.
Patent KR-20110048449-A (KR)
IPC: F16K31/06
Filed: 2010-07-12
Abstract: PURPOSE: A flow path switch control device is provided to prevent noise and vibration generated in the operation of a solenoid valve under high pressure difference. CONSTITUTION: A flow path switch control device comprises a valve apparatus(103) and a pressure balancing control circuit(104). The valve apparatus is arranged between a fluid inlet(101) and a fluid outlet(102). The pressure balancing control circuit is provided inside a flow path switch control device(100). An adjustment apparatus(105) is formed in the pressure balancing control circuit to reduce pressure variation in fluid passing through the pressure balancing control circuit when the flow path switch control device is opened or closed. The adjustment apparatus changes a flow area of the fluid within a flow path in order to reduce pressure variation.
Patent KR-20120007330-A (KR)
Title: Rig apparatus of light axis for the 3d image
Inventor: HUH SUNG RYONG
IPC: H04N5/225
Filed: 2010-07-14
Abstract: PURPOSE: A camera rig device for photographing a 3D image is provided to easily fix a vertical error of an optical axis of a left eye camera and a right eye camera by simultaneously adjusting the slope and height with a goniostage. CONSTITUTION: A stage(110) adjusts angular displacement in one direction about an optical axis of either a left or a right eye camera. A vertically moving unit(121,122,123) is installed in a lower part of the stage. The vertically moving unit linearly moves in a vertical direction about the optical axis. A linking unit(130) is connected to the lower part of the stage and the vertically moving part. The linking unit transforms the linear displacement of the vertically moving unit to angular displacement of the stage in an orthogonal direction to the one.
Patent KR-20110013238-A (KR)
Title: Melanogenesis inhibitor and skin-whitening agent
Inventor: KAWAGOSHI MASARU
IPC: A61Q19/02
Filed: 2010-07-20
Abstract: PURPOSE: A melanin production inhibitor and a whitening agent are provided to suppress melasma and fleck with safety. CONSTITUTION: A melanin production inhibitor contains a compound of chemical formula 1 as an active ingredient. A whitening agent contains the compound of chemical formula 1. The compound of chemical formula 1 is (2,2',3,3'-Tetrahydro-5,5',7,7'-tetrahydroxy-2,2'-bis(4-hydroxyphenyl)-3,3'-bi[4H-1-benzopyran]-4,4'-dione). The whitening agent is used in the form of cream, lotion, pack or foundation.
Patent KR-20120013007-A (KR)
Title: Water supplying apparatus for thermal power generation
Inventor: SIM YA SUB
IPC: E03B3/00
Filed: 2010-08-03
Abstract: PURPOSE: A water supplying apparatus for the generation of thermal power is provided to prevent the damage of a power generating facility due to foreign materials contained in water by using purified water for power generating processes. CONSTITUTION: A water supplying apparatus for the generation of thermal power includes a first water collecting part(10), a second water collecting part(20), a third water collecting part(30), a tank(40), a water purifying part(50). The first water collecting part collects filtered river bed water and eliminates foreign material from the water. The second water collecting part collects seawater and eliminates foreign materials and salinity from the water. The third water collecting part collects wastewater and eliminates foreign materials from the wastewater. The third collecting part supplies treated water to the second water collecting part. Water from the first water collecting part and the second water collecting part is contained in the tank. The water from the tank is converted into pure water by the water purifying part.
Patent KR-20120015027-A (KR)
Title: Longitudinal wave transducer wedge to maintain couplant layer and longitudinal wave transducer using the same
Inventor: YANG SEUNG HAN
IPC: G01N29/04
Filed: 2010-08-11
Abstract: PURPOSE: A longitudinal wave probe wedge for maintenance of a contact medium membrane and a longitudinal wave probe using the same are provided to maintain a uniform contact medium on the contact surface of a longitudinal wave probe. CONSTITUTION: A longitudinal wave probe wedge for maintenance of a contact medium membrane comprises a contact medium membrane maintaining part(360). The contact medium membrane maintaining part is depressed on the bottom of the probe wedge in order to maintains a uniform contact medium on a contact surface formed between an inspection surface of an object and a longitudinal probe(300) in order to secure smooth transmission of ultrasonic wave between the object and the longitudinal probe and to exclude an influence of surface topology of the object.
Patent KR-20120016873-A (KR)
Title: Mobile device
Inventor: SONG CHANG JIN
IPC: H04B1/38
Filed: 2010-08-17
Abstract: PURPOSE: A portable terminal is provided to improve the life time of a display unit by preventing the projection of the display unit which is created at the outer circumference of a first and a second case. CONSTITUTION: A second case(200) is swung around an end unit. A display unit(300) covers the end unit according to the outer circumference of a first case(100) and the second case. The one end of a first link unit(410) is fixed to the inside of the first case in a hinge unit(400). Other end of the first link is combined with a slot of the second case. A second link unit of the hinge unit is fixed to the inside of the second case. The other end of the second link unit is combined with the slot of the second case.
Patent KR-20120017187-A (KR)
Title: 커플드 토션빔 액슬 현가장치
Inventor: OH JE TAEK
IPC: B60G7/02
Filed: 2010-08-18
Abstract: 본 발명의 커플드 토션빔 액슬 현가장치인 CTBA(Coupled Torsion Beam Axle Suspension)에는 토션빔(1)의 양끝단으로 용접된 트레일링암(2)의 마운팅부시(3)에 외력에 대해 탄성변형되도록 소프트매스부(9b)와 하드매스부(9a)를 갖는 토우컨트롤러(4)가 한쪽을 고정하고 그 타측을 차체의 안쪽으로 체결됨으로써, 선회에 따른 횡력(Fa)시 상기 토우컨트롤러(4)에 발생되는 변형력(Fc,Fcc)의 작용으로 선회 안쪽인 좌측차륜의 트레일링암(2)의 부위가 밀려나고 선회 바깥쪽인 우측차륜의 트레일링암(2)의 부위가 잡아당겨져 오버스티어(Oversteer)를 방지하는 토우-인을 형성하고, 또한 제동에 따른 전후력(Fk)시 상기 토우컨트롤러(4)에 발생된 회전토크(Ta,Taa)의 작용으로 좌측차륜의 트레일링암(2)에 시계방향의 모멘트(Tcc)와 우측차륜의 트레일링암(2)에 반시계방향의 모멘트(Tc)가 형성되어 오버스티어(Oversteer)를 방지하는  토우-인을 형성할 수 있는 특징을 갖는다.
Patent KR-20120019196-A (KR)
Title: Etchant composition for etching a conductive multi-layer film and etching method using the same
Inventor: SEO JONG HYUN
IPC: C23F1/18
Filed: 2010-08-25
Abstract: PURPOSE: Etchant composition for etching a conductive multi-layer film and an etching method using the same are provided to ensure excellent etching profile and characteristics since multi layers including one or more layers of molybdenum or molybdenum alloy and one or more layers of Cu or Cu alloy including a Cu/Mo deposited metallic film, a Cu/Mo-alloy deposited metallic film, Cu-alloy/Mo-alloy deposited metallic film are simultaneously etched. CONSTITUTION: Etchant composition for etching a conductive multi-layer film comprises phosphoric acid of 50~80 wt%, nitric acid of 0.5~10 wt%, acetic acid of 5~30 wt%, imidazole of 0.01~5 wt%, and water. The etchant composition comprises imidazole of at least 0.1 wt% and preferably 0.1-0.3 wt%. The multi-layer film comprises one or more layers of molybdenum or molybdenum alloy and one or more layers of Cu or Cu alloy including a Cu/Mo deposited metallic film, a Cu/Mo-alloy deposited metallic film, Cu-alloy/Mo-alloy deposited metallic film.
Patent KR-20110034541-A (KR)
Title: Optical pickup apparatus
Inventor: NAGATOMI KENJI
IPC: G11B7/135
Filed: 2010-08-27
Abstract: PURPOSE: An optical pickup apparatus is provided to removing stray light by combined use of a half wavelength plate and a polarizing optical element. CONSTITUTION: An optical pickup apparatus is provided with a semiconductor laser(101), a diffraction grating(102), a PBS(Polarized Beam Splitter)(103), a collimator lens(104), a quarter wavelength plate(105), an objective lens(106), a holder(107), an objective lens actuator(108), a detection lens(109), a spectral element(110), and a photodetector(111). The semiconductor laser accommodates, in a certain CAN, three laser elements which respectively emit laser light for CD and having a wavelength of about 785 nm, laser light for DVD and having a wavelength of about 650 nm, and laser light for BD and having a wavelength of about 405 nm. The objective lens is configured to properly converge BD light, CD light, and DVD light on BD, CD, and DVD, respectively. The objective lens is driven in a focusing direction and a tracking direction by the objective lens actuator in a state that the objective lens is held on the holder. The detection lens imparts astigmatism to BD light, CD light, and DVD light that have been entered from the side of the PBS. BD light, CD light, and DVD light imparted with astigmatism are entered into the spectral element. The spectral element has a stepped diffraction pattern on an incident surface thereof.
Patent KR-20120020463-A (KR)
Title: Getter assembly and manufacturing method thereof
Inventor: CHO HYUN SEUNG
IPC: H01J7/18
Filed: 2010-08-30
Abstract: PURPOSE: A getter assembly and a manufacturing method thereof are provided to fix the getter assembly by elastically transfiguring a support unit and creating pressure in a plurality of spacers in case the getter assembly is installed in a getter room. CONSTITUTION: A support unit(120) supports a plurality of getters. The support unit is elastically transfigured and creates pressure in a plurality of spacers. The support unit fixes a getter assembly. A plurality of spacers includes first and second spacers which are contiguous. A plurality of support bars(121) fixes a plurality of getters. A binding bar(125) unites a plurality of support bars. A plurality of support bars respectively comprises first and second elastic transfiguring parts formed on both end of the support bar, and a getter fixing part formed between the first and second elastic transfiguring parts.
Patent KR-20120021112-A (KR)
Title: Device of a single vinyl house for keeping warmth
Inventor: JOO JAE HUN
IPC: A01G9/24
Filed: 2010-08-31
Abstract: PURPOSE: A heating device for a single-span vinyl house is provided to automate an opening and closing process of a heating cover for the vinyl house for reducing the manpower and heating expenses. CONSTITUTION: A heating device for a single-span vinyl house comprises the following: a first fixing bar(320) combined to plural bow sticks(100) from left and right sides of the vinyl house for horizontally supporting the vinyl house; a first towing shaft(340) combined to the first fixing bar using plural first towing ropes(342); a first towing motor(360) combined to one end of the first towing shaft for rotating the first towing shaft; a cover fixing bar(380) combined to a second towing rope(346); a side cover(390) for thermally insulating the side surface of the vinyl house; a controller(500) for controlling the first towing motor; a first towing drum(344) for winding the first towing ropes; a second towing drum(348) for winding the second towing rope; and a second towing shaft(440) combined to a third towing rope(442).
Patent KR-20120033613-A (KR)
Title: A cam for press die
Inventor: JANG SE WOOK
IPC: B30B15/02
Filed: 2010-09-30
Abstract: PURPOSE: A cam mechanism for a press mold is provided to reduce the entire volume of a cam mechanism increasing strength and spring foot effort using a disc spring. CONSTITUTION: A cam mechanism for a press mold comprises a drive cam(100), a slide cam(200), and a lower die(300). The drive cam moves with reciprocating of the upper mold(110) of the press mold. The slide cam consists of a lower body(220) and an upper body(210). The upper body is fixed to the rear upper part of the lower body. The sliding slope(211) of the upper body is formed to pair with the drive slope(120) of the drive cam. If the drive cam moves up and down, the upper body moves horizontally. A piercing punch(600) is coupled to the front central part of the lower body.
Patent KR-20120036069-A (KR)
Title: 버튼 달린 지우개
Inventor: KIM SEON TAE
IPC: B43L19/00
Filed: 2010-10-07
Abstract: 지우개 껍데기에 스프링과 플라스틱 버튼을 붙여 높이 조절이 가능하게 한다.
Patent KR-20120039135-A (KR)
Title: The gum cabin of inside gum paper
Inventor: KIM YUN HYENG
IPC: B65D85/60
Filed: 2010-10-15
Abstract: PURPOSE: A gum container including gum paper is provided to protect the clean street environment by enabling users to wrap gum after chewing before throwing away. CONSTITUTION: A gum container includes gum paper located on the lower side of the container. A user can rotate the bottom of the gum container for separating the container and discharging the gum paper one by one, and wrap gum after chewing before throwing away into a garbage can.
Patent KR-20120039347-A (KR)
Title: Wind power generator
Inventor: LEE WHA LANG
IPC: F03D1/04
Filed: 2010-10-15
Abstract: PURPOSE: A wind power generator for supplying auxiliary power of a ship is provided to store electricity in a sub battery and to prevent loading a large amount of fuel tanks. CONSTITUTION: A wind power generator for supplying auxiliary power of a ship comprises a wind power generation device(1), main battery, auxiliary battery, and control unit. The wind power generation device generate power using wind during driving the ship(100) and comprises an inlet(12), blow channel, and housing(11). The housing is mounted on the roof or bottom part of the ship. The control device controls charging of electricity in the auxiliary battery and senses charge amount of the main battery.
Patent KR-20120061116-A (KR)
Title: Method and Apparatus for Measuring Moisture Content in a Sample Using Multi Phase Microwave
Inventor: WOO YOUNG JE
IPC: G01N22/04
Filed: 2010-10-25
Abstract: PURPOSE: A method and device for measuring moisture content using multiple phase difference microwaves are provided to quantitatively measure moisture content with respect to a specimen and to perform a measurement with the high reliability in which noise is removed. CONSTITUTION: A method for measuring moisture content using multiple phase difference microwaves is as follows. Multiple phase difference microwaves composed of basic receiving waves(S1) and phase difference oscillation transmission waves(S2,S3) are irradiated to a measurement specimen, thereby making pass through. The basic receiving waves are composed of microwaves having an amplitude(E) and frequencies. The phase difference oscillation transmission waves having the same amplitude and frequencies with the basic receiving waves are composed of a plurality of microwaves having a phase difference in an oscillation. The amplitudes with respect to each receiving wave are measured by detecting the receiving waves corresponding to the basic receiving waves have passed through the measurement specimen and a plurality of the phase difference oscillation transmission waves. The measured amplitude values of the receiving waves are taken an average so that average amplitude of the receiving waves is obtained. An amplitude difference value of the receiving waves received by irradiating the basic receiving waves to the specimen of an identical sort in the state of being absolutely dried and the average amplitude is calculated. The receiving waves in which the frequencies and amplitude in an ideal state are known are irradiated to reference specimens of the identical sort with the measurement specimen in which the moisture content is known and measures a change of the amplitude by irradiating the identical receiving waves to the specimen of an identical sort in the state of being absolutely dried. The amplitude difference value are multiplied by a proportional constant known in advance using a relation of the moisture content and amplitude change of the reference specimen so that the moisture content of the measurement specimen is measured.
Patent KR-20120043780-A (KR)
Title: Safe cup
Inventor: KIM KYEONG JAE
IPC: A47G19/22
Filed: 2010-10-27
Abstract: PURPOSE: A safe cup is provided to be used safely and conveniently by attaching plastics which have low thermal conductivity to outside the stainless cup. CONSTITUTION: A safe cup has stainless inside. Finger contacting part located outside the safety cup is made of plastic material and is designed as finger shape in order for users to grip the cup easily. The plastic has low thermal conductivity, thereby enabling users to use the cup safer and more conveniently. The safety cup enables a user to use hot cup conveniently and safely. A manufacturing method of the safe cup reduces use amount of stainless and production cost.
Patent KR-20120044729-A (KR)
Title: Pre-treatment agent composition for digital textile printing of cellulose and nylon mixed fabric and digital textile printing method using the same
Inventor: KIM MI KYUNG
IPC: D06M13/438
Filed: 2010-10-28
Abstract: PURPOSE: A pretreatment composition for digital dyeing and a method for digital dyeing of cellulose-nylon composite materials are provided to ensure excellent color expression on a cellulose fiber and a nylon fiber. CONSTITUTION: A pretreatment composition for digital dyeing for cellulose/nylon composite materials contains 0.1-3 wt% of sodium2-(2,3-dibromopropionyl-amino)-5-(4,6-dichlroro-1,3,5-triazinylamino)-benzensulfonate; 1.5-10 wt% of complex thickening agent including polyacrylate-based thickening agent, alginate-based thickening agent, and gum-based thickening agent; 0.1-2.5 wt% of neutral salt, 1-18 wt% of hydrotrope containing urea, 0.5-3.0 wt% of water repellent, and water.
Patent KR-20120046397-A (KR)
Title: Backlight unit and liquid crystal display comprising the same
Inventor: KIM JIN RYUN
IPC: G02F1/1335
Filed: 2010-11-02
Abstract: PURPOSE: A backlight unit and a liquid crystal display device with the same are provided to adjust beads of a diffusion unit of an upper diffusion sheet, thereby increasing concealment power and luminance. CONSTITUTION: A light guide plate(130) guides light of a light source(140). An optical member(150) is located on the light guide plate. The optical member comprises a lower diffusion sheet(151), a prism sheet(154), and an upper diffusion sheet(156). The prism sheet is located on the lower diffusion sheet. The upper diffusion sheet is located on the prism sheet. The upper diffusion sheet includes a first bead and a second bead which have different diameters.
Patent KR-20120048295-A (KR)
Inventor: SEO JONG WON
IPC: E04H1/12
Filed: 2010-11-05
Abstract: 이중방수효과와 함께 멀티 사이즈로 인해 시공비을 절감할 수 있고, 공사시간을 단축할 수 있는 프리캐스팅 욕실바닥판 및 이의 제작방법과 시공방법이 개시된다. 본 발명에 따른 프리캐스팅 욕실바닥판은 굴곡부가 일체로 형성되면서 멀티 사이즈가 되는 ABS방수시트와, 이 ABS방수시트위에 접합되는 발포콘크리트 방수판으로 구성되고, 발포콘크리트 방수판은 배수구쪽을 향해 곡면 가공되어 구배가 형성되고, 사방쪽 단부에는 벽패널이 삽입되도록 걸림턱이 형성된다. 이때 발포콘크리트 방수판의 배수구 위치는 자유롭게 설계가 가능하며, ABS방수시트와 발포콘크리트 방수판의 이중구조 배수 및 방수 시스템이다. 또한, 발포콘크리트 방수판에는 난방을 위한 "U"자형 온돌파이프 설치홈이 형성될 수 있으며, 욕조가 설치될 부분에는 발포콘크리트 방수판을 설치하지 않고 세팅블록을 인코너에 설치하여 벽패널의 높이 및 코너각을 유지할 수 있다.