Manufacture of arch culverts,申请号US19400350231-传众专利搜索

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发明名称	Manufacture of arch culverts
摘要
申请公布号	US2358960(A)	申请公布日期	1944.09.26
申请号	US19400350231	申请日期	1940.08.03
申请人	THE AMERICAN ROLLING MILL COMPANY	发明人	CLEVE ARTHUR F.
分类号	B21D51/00;E03F3/04	主分类号	B21D51/00
代理机构		代理人
主权项
地址

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