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发明名称
Evacuating pump
摘要
申请公布号
US1822702(A)
申请公布日期
1931.09.08
申请号
US19290386755
申请日期
1929.08.19
申请人
AKTIENGESELLSCHAFT BROWN BOVERI & COMPAGNIE
发明人
KOBEL ERNST
分类号
F04F9/00
主分类号
F04F9/00
代理机构
代理人
主权项
地址
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