Process for producing flexible drill pipe having wear resistant mating surfaces,申请号US19540467915-传众专利搜索

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发明名称	Process for producing flexible drill pipe having wear resistant mating surfaces
摘要
申请公布号	US2722494(A)	申请公布日期	1955.11.01
申请号	US19540467915	申请日期	1954.11.10
申请人	ZUBLIN JOHN A	发明人	ZUBLIN JOHN A.
分类号	E21B17/046;E21B17/20	主分类号	E21B17/046
代理机构		代理人
主权项
地址

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