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发明名称
Verfahren zur Herstellung von Rippenrohren.
摘要
申请公布号
CH178846(A)
申请公布日期
1935.08.15
申请号
CHD178846
申请日期
1934.05.16
申请人
HAPPEL,OTTO
发明人
HAPPEL,OTTO
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主分类号
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