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发明名称
Concrete floor construction
摘要
申请公布号
US1883191(A)
申请公布日期
1932.10.18
申请号
US19300435846
申请日期
1930.03.14
申请人
WELLS HEWITT L
发明人
WELLS HEWITT L.
分类号
E04G11/46
主分类号
E04G11/46
代理机构
代理人
主权项
地址
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