Method of forming tapered holes in metal castings,申请号US19310511542-传众专利搜索

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发明名称	Method of forming tapered holes in metal castings
摘要
申请公布号	US1872899(A)	申请公布日期	1932.08.23
申请号	US19310511542	申请日期	1931.01.27
申请人	COREY FRED B	发明人	COREY FRED B.
分类号	B22D19/00	主分类号	B22D19/00
代理机构		代理人
主权项
地址

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