Diamond set core bit,申请号US19550489575-传众专利搜索

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发明名称	Diamond set core bit
摘要
申请公布号	US2809808(A)	申请公布日期	1957.10.15
申请号	US19550489575	申请日期	1955.02.21
申请人	WHEEL TRUEING TOOL COMPANY	发明人	CATALLO LEO
分类号	E21B10/48;E21B10/60	主分类号	E21B10/48
代理机构		代理人
主权项
地址

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