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发明名称
摘要
申请公布号
BE679720(A)
申请公布日期
1966.10.03
申请号
BED679720
申请日期
1966.04.19
申请人
发明人
分类号
C04B28/26;C04B41/52
主分类号
C04B28/26
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代理人
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地址
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