different material pipe prevented welding point from breaking off and the method for the same,申请号KR20090084663-传众专利搜索

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发明名称	different material pipe prevented welding point from breaking off and the method for the same
摘要
申请公布号	KR101130849(B1)	申请公布日期	2012.03.28
申请号	KR20090084663	申请日期	2009.09.08
申请人		发明人
分类号	B21D7/00;B21C37/08;B23P15/00;F16L13/02	主分类号	B21D7/00
代理机构		代理人
主权项
地址

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