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发明名称
Multiple slab unit
摘要
申请公布号
US1888417(A)
申请公布日期
1932.11.22
申请号
US19300452747
申请日期
1930.05.15
申请人
ABERSON NATHANIEL L
发明人
ABERSON NATHANIEL L.
分类号
E04F13/14
主分类号
E04F13/14
代理机构
代理人
主权项
地址
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