DRILLING STRING PLUG,申请号CAD414614-传众专利搜索

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发明名称	DRILLING STRING PLUG
摘要
申请公布号	CA414614(A)	申请公布日期	1943.08.17
申请号	CAD414614	申请日期
申请人	SHELL DEVELOPMENT COMPANY	发明人	HORACE VIVIAN STEADMAN;ELLIS E. DAVIS
分类号		主分类号
代理机构		代理人
主权项
地址

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