REAMING SHELLS FOR DRILLING APPARATUS,申请号GB19740042126-传众专利搜索

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发明名称	REAMING SHELLS FOR DRILLING APPARATUS
摘要
申请公布号	GB1478880(A)	申请公布日期	1977.07.06
申请号	GB19740042126	申请日期	1975.09.26
申请人	VAN MOPPES & SONS LTD L	发明人
分类号	E21B10/26;E21B10/48;(IPC1-7):E21B9/22	主分类号	E21B10/26
代理机构		代理人
主权项
地址

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