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发明名称
Improvements in borehole clinometers
摘要
申请公布号
GB422701(A)
申请公布日期
1935.01.10
申请号
GB19330019462
申请日期
1933.07.10
申请人
STAINTON WILLIAMS
发明人
分类号
E21B47/022
主分类号
E21B47/022
代理机构
代理人
主权项
地址
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