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发明名称
Improvements in or relating to constructional materials
摘要
申请公布号
GB627532(A)
申请公布日期
1949.08.10
申请号
GB19470002802
申请日期
1947.01.29
申请人
JAMES BENNIE
发明人
分类号
C04B26/02;C04B28/26
主分类号
C04B26/02
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代理人
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