Automatic arc welding head,申请号US19400346746-传众专利搜索

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发明名称	Automatic arc welding head
摘要
申请公布号	US2278975(A)	申请公布日期	1942.04.07
申请号	US19400346746	申请日期	1940.07.22
申请人	A. O. SMITH CORPORATION	发明人	CRAWFORD WILLIAM E.
分类号	B23K9/133	主分类号	B23K9/133
代理机构		代理人
主权项
地址

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