Determination of well pipe perforations,申请号GB19450029355-传众专利搜索

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发明名称	Determination of well pipe perforations
摘要
申请公布号	GB599057(A)	申请公布日期	1948.03.03
申请号	GB19450029355	申请日期	1945.11.05
申请人	GRANT OIL TOOL COMPANY	发明人
分类号	E21B43/119;E21B47/09	主分类号	E21B43/119
代理机构		代理人
主权项
地址

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