Chuck closing and opening mechanism,申请号US19290394623-传众专利搜索

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发明名称	Chuck closing and opening mechanism
摘要
申请公布号	US1831225(A)	申请公布日期	1931.11.10
申请号	US19290394623	申请日期	1929.09.23
申请人	BOGART FRED H	发明人	BOGART FRED H.
分类号	B23B31/28	主分类号	B23B31/28
代理机构		代理人
主权项
地址

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