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发明名称
Remotely sensing of excavation cavity during mining
摘要
申请公布号
GB2166471(A)
申请公布日期
1986.05.08
申请号
GB19850023322
申请日期
1985.09.20
申请人
* CONOCO INC
发明人
ESTON F * PETRY;JOHN B * RIESTER
分类号
E21C45/00;(IPC1-7):E21C45/00
主分类号
E21C45/00
代理机构
代理人
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地址
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