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发明名称
Improvements in or relating to methods of locating underground cavities and fissures
摘要
申请公布号
GB1057519(A)
申请公布日期
1967.02.01
申请号
GB19650052888
申请日期
1965.12.13
申请人
RAND MINES LIMITED
发明人
VERMEULEN DIRK JAN
分类号
E21B47/02;G01S11/06;G01V3/30
主分类号
E21B47/02
代理机构
代理人
主权项
地址
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