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发明名称
Ceiling construction
摘要
申请公布号
US1816450(A)
申请公布日期
1931.07.28
申请号
US19300453141
申请日期
1930.05.17
申请人
VENZIE FREDERICK M
发明人
VENZIE FREDERICK M.
分类号
E04B9/24
主分类号
E04B9/24
代理机构
代理人
主权项
地址
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