Apparatus for electric arc welding pipe,申请号US19290388366-传众专利搜索

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发明名称	Apparatus for electric arc welding pipe
摘要
申请公布号	US1840330(A)	申请公布日期	1932.01.12
申请号	US19290388366	申请日期	1929.08.26
申请人	A. O. SMITH CORPORATION	发明人	PRIEBE ARTHUR W.
分类号	B23K9/073	主分类号	B23K9/073
代理机构		代理人
主权项
地址

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