Apparatus for depositing granular material in a well bore,申请号US19510255447-传众专利搜索

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发明名称	Apparatus for depositing granular material in a well bore
摘要
申请公布号	US2727575(A)	申请公布日期	1955.12.20
申请号	US19510255447	申请日期	1951.11.08
申请人	ESSO RESEARCH AND ENGINEERING COMPANY	发明人	ABENDROTH GUSS F.
分类号	E21B43/04	主分类号	E21B43/04
代理机构		代理人
主权项
地址

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