Valve seat and method of making same,申请号US19400327053-传众专利搜索

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发明名称	Valve seat and method of making same
摘要
申请公布号	US2277356(A)	申请公布日期	1942.03.24
申请号	US19400327053	申请日期	1940.03.30
申请人	SARGENT ENGINEERING CORPORATION	发明人	SARGENT EDWARD J.
分类号	B23K31/02;F16K1/42	主分类号	B23K31/02
代理机构		代理人
主权项
地址

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