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发明名称
A process for manufacturing waterproof composition for portland cement
摘要
申请公布号
GB325991(A)
申请公布日期
1930.03.06
申请号
GB19290005025
申请日期
1929.02.14
申请人
HIDEKITI HAMAKADO
发明人
分类号
C04B22/08;C04B28/04
主分类号
C04B22/08
代理机构
代理人
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