Outil de forage rotatif pour roches, avec aspiration des débris de forage,申请号FRD1039889-传众专利搜索

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发明名称	Outil de forage rotatif pour roches, avec aspiration des débris de forage
摘要
申请公布号	FR1039889(A)	申请公布日期	1953.10.12
申请号	FRD1039889	申请日期	1951.07.17
申请人	FRIED. KRUPP WIDIA-FABRIK	发明人
分类号	E21B10/54;E21B10/60	主分类号	E21B10/54
代理机构		代理人
主权项
地址

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