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发明名称
Steuerung von Ventilen mit Gegendruckkammer und Hilfsventil
摘要
申请公布号
DE523647(C)
申请公布日期
1931.04.25
申请号
DE1928M104869D
申请日期
1928.05.19
申请人
METZENAUER & JUNG
发明人
分类号
F16K31/40
主分类号
F16K31/40
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