DRILL STEEL CENTRALIZER,申请号CAD459307-传众专利搜索

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发明名称	DRILL STEEL CENTRALIZER
摘要
申请公布号	CA459307(A)	申请公布日期	1949.08.30
申请号	CAD459307	申请日期
申请人	JOY MANUFACTURING COMPANY	发明人	JOHN CLARK CURTIS
分类号		主分类号
代理机构		代理人
主权项
地址

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