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发明名称
Procédé de fabrication de tuyaux à ailettes et tuyaux en résultant
摘要
申请公布号
FR993943(A)
申请公布日期
1951.11.08
申请号
FRD993943
申请日期
1944.11.23
申请人
ATELIERS VENTIL
发明人
FRACHON MARC
分类号
B21C37/12
主分类号
B21C37/12
代理机构
代理人
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