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发明名称
Improvements in and relating to the construction of concrete roof constructions for buildings
摘要
申请公布号
GB643866(A)
申请公布日期
1950.09.27
申请号
GB19470017527
申请日期
1947.07.03
申请人
FRANK VICTOR BERK
发明人
分类号
E04B7/02;E04C3/20
主分类号
E04B7/02
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代理人
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