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发明名称
Procédé et appareil pour la fabrication de tuyaux soudés à joint hélicoïdal
摘要
申请公布号
FR1287192(A)
申请公布日期
1962.03.09
申请号
FR19610859840
申请日期
1961.04.25
申请人
发明人
MORSBACH PAUL
分类号
B21C37/12
主分类号
B21C37/12
代理机构
代理人
主权项
地址
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