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发明名称
BOREHOLE HARWIRE TELEMETRY SYSTEM
摘要
申请公布号
AU7247787(A)
申请公布日期
1987.11.19
申请号
AU19870072477
申请日期
1987.05.04
申请人
COAL INDUSTRY (PATENTS) LTD.,
发明人
ALAN MEADOWS
分类号
E21B17/00;E21B23/14;E21B47/12
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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