Means for cooling valves,申请号US19280310865-传众专利搜索

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发明名称	Means for cooling valves
摘要
申请公布号	US1768880(A)	申请公布日期	1930.07.01
申请号	US19280310865	申请日期	1928.10.06
申请人	PETROLEUM CONVERSION CORPORATION	发明人	BEARDSLEY EDWIN W.
分类号	C21B9/12	主分类号	C21B9/12
代理机构		代理人
主权项
地址

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