DRILLING MAST AND SUBSTRUCTURE THEREFOR,申请号GB19790004898-传众专利搜索

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发明名称	DRILLING MAST AND SUBSTRUCTURE THEREFOR
摘要
申请公布号	GB2046812(B)	申请公布日期	1982.10.13
申请号	GB19790004898	申请日期	1979.02.12
申请人	PATTERSON B C	发明人
分类号	E04H12/34;E21B15/00;(IPC1-7):E21B15/00	主分类号	E04H12/34
代理机构		代理人
主权项
地址

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