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经营范围
发明名称
ROCK MASS DEFORMATION METER FOR USE IN MINES
摘要
申请公布号
PL268202(A1)
申请公布日期
1989.04.17
申请号
PL19870268202
申请日期
1987.10.13
申请人
发明人
分类号
E21F;G01B;G01M;(IPC1-7):G01B/;E21F/;G01M/
主分类号
E21F
代理机构
代理人
主权项
地址
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