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发明名称
TRAPEZOIDAL SUPPORT
摘要
申请公布号
SU1675566(A1)
申请公布日期
1991.09.07
申请号
SU19894672740
申请日期
1989.03.03
申请人
GONTAR STANISLAV P,SU;EVGRAFOV GEORGIJ G,SU;GABOV VIKTOR V,SU
发明人
GONTAR STANISLAV P,SU;EVGRAFOV GEORGIJ G,SU;GABOV VIKTOR V,SU
分类号
E21D11/14
主分类号
E21D11/14
代理机构
代理人
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