Blast-furnace tuyere,申请号US19290377434-传众专利搜索

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发明名称	Blast-furnace tuyere
摘要
申请公布号	US1789870(A)	申请公布日期	1931.01.20
申请号	US19290377434	申请日期	1929.07.11
申请人	HOLZWORTH ERNEST H	发明人	HOLZWORTH ERNEST H.
分类号	C21B7/16	主分类号	C21B7/16
代理机构		代理人
主权项
地址

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