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发明名称
Bag pressure indicating device for suction cleaners
摘要
申请公布号
US2179808(A)
申请公布日期
1939.11.14
申请号
US19380206855
申请日期
1938.05.09
申请人
THE HOOVER COMPANY
发明人
BERG QUENTIN
分类号
A47L9/19
主分类号
A47L9/19
代理机构
代理人
主权项
地址
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