Improvements in or relating to well-drilling units,申请号GB19540018286-传众专利搜索

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发明名称	Improvements in or relating to well-drilling units
摘要
申请公布号	GB781859(A)	申请公布日期	1957.08.28
申请号	GB19540018286	申请日期	1954.06.22
申请人	NAAMLOOZE VENNOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ	发明人	WHITTLE FRANK
分类号	E21B4/00;F16J15/36	主分类号	E21B4/00
代理机构		代理人
主权项
地址

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