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经营范围
发明名称
摘要
申请公布号
BE646043(A)
申请公布日期
1964.10.02
申请号
BE19640646043
申请日期
1964.04.02
申请人
发明人
分类号
C03B18/04;C03B18/06;C03B18/22
主分类号
C03B18/04
代理机构
代理人
主权项
地址
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