Mèche de perforatrice de rocher.,申请号CHD286031-传众专利搜索

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发明名称	Mèche de perforatrice de rocher.
摘要
申请公布号	CH286031(A)	申请公布日期	1952.10.15
申请号	CHD286031	申请日期	1950.06.23
申请人	THE TIMKEN ROLLER BEARING COMPANY	发明人	COMPANY THE TIMKEN ROLLER BEARING
分类号	E21B17/04	主分类号	E21B17/04
代理机构		代理人
主权项
地址

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