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发明名称
Verfahren zur Herstellung eines Rohres mit vieleckigem gleichbleibenden oder sich verengenden Innenquerschnitt
摘要
申请公布号
DE768148(C)
申请公布日期
1958.07.03
申请号
DE1941A094718D
申请日期
1941.12.28
申请人
GUSTAV APPEL MASCHINENFABRIK
发明人
GRILL FRANZ DIPL.-ING.;KRALOWETZ BRUNO DIPL.-ING.;SELLE OTTO
分类号
B21C37/15
主分类号
B21C37/15
代理机构
代理人
主权项
地址
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