ELECTRO-HYDRAULIC PARALLEL MOTION MEANS FOR DRILL BOOM SUPPORTED ROCK DRILLING APPARATUS,申请号USD3481409-传众专利搜索

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发明名称	ELECTRO-HYDRAULIC PARALLEL MOTION MEANS FOR DRILL BOOM SUPPORTED ROCK DRILLING APPARATUS
摘要
申请公布号	US3481409(A)	申请公布日期	1969.12.02
申请号	USD3481409	申请日期	1967.11.13
申请人	ATLAS COPCO AB.	发明人	BENGT ARVID WESTERLUND
分类号	E21B15/04;(IPC1-7):E21C5/11;E21C9/00;E21C11/00	主分类号	E21B15/04
代理机构		代理人
主权项
地址

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