Apparatus for and method of making boiler headers,申请号US19280268043-传众专利搜索

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发明名称	Apparatus for and method of making boiler headers
摘要
申请公布号	US1819636(A)	申请公布日期	1931.08.18
申请号	US19280268043	申请日期	1928.04.06
申请人	CAIN JOHN J	发明人	CAIN JOHN J.
分类号	B21C37/20	主分类号	B21C37/20
代理机构		代理人
主权项
地址

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