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发明名称
APPARATUS FOR PLACING ROOF SUPPORTS IN A DRIVEN GALLERY
摘要
申请公布号
PL158327(B1)
申请公布日期
1992.08.31
申请号
PL19870265808
申请日期
1987.05.21
申请人
发明人
分类号
E21D13/04;E21D11/40;(IPC1-7):E21D11/40;E21C11/00;E21D20/00
主分类号
E21D13/04
代理机构
代理人
主权项
地址
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