Method of hardening steel,申请号US19310572728-传众专利搜索

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发明名称	Method of hardening steel
摘要
申请公布号	US1967994(A)	申请公布日期	1934.07.24
申请号	US19310572728	申请日期	1931.11.02
申请人	CHAPMAN VALVE MANUFACTURING COMPANY	发明人	MALCOLM VINCENT T.
分类号	C22C38/22	主分类号	C22C38/22
代理机构		代理人
主权项
地址

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