Drilling equipment and well pipe cleaner,申请号US19500179605-传众专利搜索

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发明名称	Drilling equipment and well pipe cleaner
摘要
申请公布号	US2642942(A)	申请公布日期	1953.06.23
申请号	US19500179605	申请日期	1950.08.15
申请人	REYNOLDS CHARLES B	发明人	REYNOLDS CHARLES B.
分类号	E21B33/08	主分类号	E21B33/08
代理机构		代理人
主权项
地址

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