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发明名称
Floor polishing and vacuum cleaning machine
摘要
申请公布号
US1933492(A)
申请公布日期
1933.10.31
申请号
US19290358560
申请日期
1929.04.27
申请人
S. C. JOHNSON & SON
发明人
BEACH CHESTER H.
分类号
A47L11/204
主分类号
A47L11/204
代理机构
代理人
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地址
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