Method of making butt-welded tubes,申请号US19330690434-传众专利搜索

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发明名称	Method of making butt-welded tubes
摘要
申请公布号	US1978235(A)	申请公布日期	1934.10.23
申请号	US19330690434	申请日期	1933.09.21
申请人	SUMMERS MYRON C	发明人	SUMMERS MYRON C.
分类号	B23K5/06	主分类号	B23K5/06
代理机构		代理人
主权项
地址

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