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发明名称
Automatic vacuum cleaners
摘要
申请公布号
US2789660(A)
申请公布日期
1957.04.23
申请号
US19540429260
申请日期
1954.05.12
申请人
ELECTROLUX CORPORATION
发明人
BROWN RAYMOND L.
分类号
A47L9/00;A47L9/28
主分类号
A47L9/00
代理机构
代理人
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