ROCK DRILL VALVE MECHANISM,申请号CAD412335-传众专利搜索

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发明名称	ROCK DRILL VALVE MECHANISM
摘要
申请公布号	CA412335(A)	申请公布日期	1943.05.11
申请号	CAD412335	申请日期
申请人	ROBERT ERNEST DOWNING	发明人	ROBERT ERNEST DOWNING
分类号		主分类号
代理机构		代理人
主权项
地址

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