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发明名称
Depth and operation recorder for earth bore drilling rigs
摘要
申请公布号
US2974523(A)
申请公布日期
1961.03.14
申请号
US19530391645
申请日期
1953.11.12
申请人
STAR RECORDER CORPORATION
发明人
BENDAR ARTHUR Z.
分类号
E21B47/04
主分类号
E21B47/04
代理机构
代理人
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地址
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