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经营范围
发明名称
Improvements in and relating to the manufacture of cement
摘要
申请公布号
GB519770(A)
申请公布日期
1940.04.05
申请号
GB19380019558
申请日期
1938.07.01
申请人
RITTER PRODUCTS CORPORATION
发明人
分类号
C04B7/38
主分类号
C04B7/38
代理机构
代理人
主权项
地址
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