Triple valve lapping tool,申请号US19290396484-传众专利搜索

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发明名称	Triple valve lapping tool
摘要
申请公布号	US1970867(A)	申请公布日期	1934.08.21
申请号	US19290396484	申请日期	1929.10.01
申请人	NATIONAL AIR BRAKE SERVICE, INC.	发明人	RICHETTS JAMES R.
分类号	B24B35/00	主分类号	B24B35/00
代理机构		代理人
主权项
地址

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