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发明名称
Procédé pour la fixation d'une ailette hélicoïdale à la surface d'un ? métallique
摘要
申请公布号
FR1488490(A)
申请公布日期
1967.07.13
申请号
FR19660070029
申请日期
1966.07.20
申请人
HOWELL & COMPANY LIMITED
发明人
分类号
B21C37/26
主分类号
B21C37/26
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