Gun type casing perforator,申请号US19400344115-传众专利搜索

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发明名称	Gun type casing perforator
摘要
申请公布号	US2276161(A)	申请公布日期	1942.03.10
申请号	US19400344115	申请日期	1940.07.05
申请人	COLE CAWTHERN C	发明人	COLE CAWTHERN C.
分类号	E21B43/116	主分类号	E21B43/116
代理机构		代理人
主权项
地址

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