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发明名称
BOREHOLE APPARATUS VALVES
摘要
申请公布号
CA780163(A)
申请公布日期
1968.03.12
申请号
CAD780163
申请日期
申请人
SCHLUMBERGER WELL SURVEYING CORPORATION
发明人
WILLIAM O. BERRYMAN
分类号
主分类号
代理机构
代理人
主权项
地址
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