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发明名称
Drilling recording chart holder
摘要
申请公布号
US2970879(A)
申请公布日期
1961.02.07
申请号
US19570652296
申请日期
1957.04.11
申请人
EASTMAN OIL WELL SURVEY COMPANY
发明人
SHULZ JACK S.
分类号
B42F9/00
主分类号
B42F9/00
代理机构
代理人
主权项
地址
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