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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0648958 (1991-02-01) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 6 인용 특허 : 0 |
A mold board construction includes a body made of concrete and a number of steel wires embedded in the body. A number of grooves are formed in the surfaces of the body so that a number of protrusions are formed on the body, and a number of holes are formed in the body so that the body can be fixed t
An object comprising: a plurality of strips integrally fixed to a ground surface so that a hollow space for forming said object is formed among said strips, a plurality of first screw holes being formed in said strips: four mold board constructions fixed to said strips so as to form two pairs of opp
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