Sand line core barrel,申请号US19380208213-传众专利搜索

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发明名称	Sand line core barrel
摘要
申请公布号	US2167991(A)	申请公布日期	1939.08.01
申请号	US19380208213	申请日期	1938.05.16
申请人	OLIVER GUY C	发明人	OLIVER GUY C.
分类号	E21B25/02	主分类号	E21B25/02
代理机构		代理人
主权项
地址

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