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发明名称
Improvements in or relating to concrete floors
摘要
申请公布号
GB643091(A)
申请公布日期
1950.09.15
申请号
GB19470030548
申请日期
1947.11.18
申请人
WILLEM PRONK
发明人
分类号
E04B5/06
主分类号
E04B5/06
代理机构
代理人
主权项
地址
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