Atmospheric control for heat treating furnaces,申请号US19310513892-传众专利搜索

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发明名称	Atmospheric control for heat treating furnaces
摘要
申请公布号	US1851831(A)	申请公布日期	1932.03.29
申请号	US19310513892	申请日期	1931.02.06
申请人	HAYES CARL I	发明人	HAYES CARL I.
分类号	C21D1/74	主分类号	C21D1/74
代理机构		代理人
主权项
地址

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