Adjustable bottom hole flow bean,申请号US19300425467-传众专利搜索

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发明名称	Adjustable bottom hole flow bean
摘要
申请公布号	US1893934(A)	申请公布日期	1933.01.10
申请号	US19300425467	申请日期	1930.02.03
申请人	SHELL PETROLEUM CORPORATION	发明人	DURWARD ERIC S.
分类号	E21B34/12	主分类号	E21B34/12
代理机构		代理人
主权项
地址

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