Automatic cathead especially for use in well-drilling plant,申请号GB19380028830-传众专利搜索

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发明名称	Automatic cathead especially for use in well-drilling plant
摘要
申请公布号	GB519052(A)	申请公布日期	1940.03.14
申请号	GB19380028830	申请日期	1938.10.04
申请人	FRANK MOODY OWEN	发明人
分类号	E21B19/16	主分类号	E21B19/16
代理机构		代理人
主权项
地址

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