UNSCREWING OF STRINGS OF ELEMENTS,申请号GB19750006811-传众专利搜索

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发明名称	UNSCREWING OF STRINGS OF ELEMENTS
摘要
申请公布号	GB1499517(A)	申请公布日期	1978.02.01
申请号	GB19750006811	申请日期	1975.02.18
申请人	STENUICK FRERES	发明人
分类号	E21B19/16;E21B21/10;(IPC1-7):E21B19/16	主分类号	E21B19/16
代理机构		代理人
主权项
地址

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