Plugging tool for a well pipe,申请号US19570689074-传众专利搜索

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发明名称	Plugging tool for a well pipe
摘要
申请公布号	US2888079(A)	申请公布日期	1959.05.26
申请号	US19570689074	申请日期	1957.10.09
申请人	CYPHER MAY E	发明人	CYPHER MAY E.
分类号	E21B33/126;E21B33/129	主分类号	E21B33/126
代理机构		代理人
主权项
地址

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