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发明名称
ROOF SUPPORT CAPPING
摘要
申请公布号
PL139759(B2)
申请公布日期
1987.02.28
申请号
PL19850253305
申请日期
1985.05.07
申请人
发明人
分类号
E21D;E21D17/04;E21D23/06;(IPC1-7):E21D23/06
主分类号
E21D
代理机构
代理人
主权项
地址
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