BACKING DEVICE FOR WELDING SQUARE PIPES,申请号JP19750144126-传众专利搜索

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发明名称	BACKING DEVICE FOR WELDING SQUARE PIPES
摘要
申请公布号	JPS5268041(A)	申请公布日期	1977.06.06
申请号	JP19750144126	申请日期	1975.12.03
申请人	NITSUTETSU YOUSETSU KOUGIYOU KK	发明人	YONEDA KENJI
分类号	B23K37/06	主分类号	B23K37/06
代理机构		代理人
主权项
地址

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