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发明名称
VERFAHREN UND VORRICHTUNG ZUM HERSTELLEN LAENGSNAHTGESCHWEISSTER ROHRE VERSCHIEDENER DURCHMESSER
摘要
申请公布号
DE2529466(B2)
申请公布日期
1977.04.14
申请号
DE19752529466
申请日期
1975.07.02
申请人
发明人
分类号
B21C37/08;B21D5/12;(IPC1-7):B21C37/08
主分类号
B21C37/08
代理机构
代理人
主权项
地址
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