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发明名称
(A) ;Method for producing a helically wound pipe having a predetermined diameter
摘要
申请公布号
US4287739(B1)
申请公布日期
1984.05.22
申请号
US19790023585
申请日期
1979.03.26
申请人
发明人
分类号
B21C37/12
主分类号
B21C37/12
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代理人
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