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发明名称
Concrete floor form
摘要
申请公布号
US2490527(A)
申请公布日期
1949.12.06
申请号
US19470733029
申请日期
1947.03.07
申请人
JAMES LEDBETTER
发明人
LEDBETTER JAMES
分类号
E04B5/23
主分类号
E04B5/23
代理机构
代理人
主权项
地址
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