Improvements in apparatus for perforating well casing,申请号GB19490001406-传众专利搜索

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发明名称	Improvements in apparatus for perforating well casing
摘要
申请公布号	GB686530(A)	申请公布日期	1953.01.28
申请号	GB19490001406	申请日期	1949.01.18
申请人	GULF RESEARCH & DEVELOPMENT COMPANY	发明人
分类号	E21B29/02;E21B43/117;F42B3/08	主分类号	E21B29/02
代理机构		代理人
主权项
地址

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