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发明名称
METHOD OF CHECKING MINE WORKINGS FOR THEIR CONDITION AND QUALITY OF FILLING THEM
摘要
申请公布号
PL135897(B1)
申请公布日期
1985.12.31
申请号
PL19820238150
申请日期
1982.09.06
申请人
发明人
分类号
E21F;E21F15/00;G01V1/00;(IPC1-7):G01V1/00
主分类号
E21F
代理机构
代理人
主权项
地址
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