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发明名称
MINE ROOF SUPPORT WITH ADVANCING MECHANISM
摘要
申请公布号
GB2077832(B)
申请公布日期
1983.09.28
申请号
GB19810017318
申请日期
1981.06.05
申请人
BABCOCK ROOF SUPPORTS LTD
发明人
分类号
E21D23/04;E21D23/08;(IPC1-7):E21D23/08
主分类号
E21D23/04
代理机构
代理人
主权项
地址
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