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经营范围
发明名称
Improvements in or relating to cement
摘要
申请公布号
GB835769(A)
申请公布日期
1960.05.25
申请号
GB19560030539
申请日期
1956.10.08
申请人
MICHEL ELIE DOUMET
发明人
分类号
C04B7/40
主分类号
C04B7/40
代理机构
代理人
主权项
地址
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