ROCK DRILL BITS HAVING HARD INSERTS FORMING CUTTING EDGES,申请号CAD469813-传众专利搜索

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发明名称	ROCK DRILL BITS HAVING HARD INSERTS FORMING CUTTING EDGES
摘要
申请公布号	CA469813(A)	申请公布日期	1950.12.05
申请号	CAD469813	申请日期
申请人	JOHANNES ANDREAS SMUTS MALHERBE	发明人	JOHANNES ANDREAS SMUTS MALHERBE
分类号		主分类号
代理机构		代理人
主权项
地址

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