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发明名称
MECHANICAL GAUGE MEASURING THE DEPTH OF ROCK COLLAPSE AND HEIGHT OF DUMPED ROCK IN WORKED-OUT SPACE
摘要
申请公布号
SU840356(A1)
申请公布日期
1981.06.23
申请号
SU19792817288
申请日期
1979.09.18
申请人
INST GORNOGO DELA AN KAZAKHSKOJ SSR
发明人
MESHCHERYAKOV GENNADIJ V,SU;SEDININ LEONID S,SU
分类号
E21C39/00;(IPC1-7):E21C39/00
主分类号
E21C39/00
代理机构
代理人
主权项
地址
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