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发明名称
Trickling-filter floor construction
摘要
申请公布号
US1770830(A)
申请公布日期
1930.07.15
申请号
US19270233387
申请日期
1927.11.15
申请人
THE METROPOLITAN PAVING BRICK COMPANY
发明人
BARBOUR JAMES G.
分类号
C02F3/10
主分类号
C02F3/10
代理机构
代理人
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地址
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