Plugging apparatus for well tubing,申请号US19570696798-传众专利搜索

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发明名称	Plugging apparatus for well tubing
摘要
申请公布号	US2921631(A)	申请公布日期	1960.01.19
申请号	US19570696798	申请日期	1957.11.15
申请人	GAGE LONNIE L	发明人	GAGE LONNIE L.
分类号	E21B33/12	主分类号	E21B33/12
代理机构		代理人
主权项
地址

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