Circumferential pipe cutting or welding apparatus,申请号US19310573356-传众专利搜索

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发明名称	Circumferential pipe cutting or welding apparatus
摘要
申请公布号	US1879444(A)	申请公布日期	1932.09.27
申请号	US19310573356	申请日期	1931.11.06
申请人	AIR REDUCTION COMPANY, INCORPORATED	发明人	OST WILLIAM R.;LAWRENCE FRANK S.
分类号	B23K7/00	主分类号	B23K7/00
代理机构		代理人
主权项
地址

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