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发明名称
Lubricating seal for cables
摘要
申请公布号
US2815969(A)
申请公布日期
1957.12.10
申请号
US19540430868
申请日期
1954.05.19
申请人
SCHLUMBERGER WELL SURVEYING CORPORATION
发明人
LEBOURG MAURICE P.
分类号
D07B7/12;E21B33/072
主分类号
D07B7/12
代理机构
代理人
主权项
地址
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