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发明名称
摘要
申请公布号
DE2037643(A1)
申请公布日期
1972.02.03
申请号
DE19702037643
申请日期
1970.07.29
申请人
PHILIPS NV
发明人
分类号
C04B35/46;C04B35/48;C04B35/50;C04B35/51;(IPC1-7):C04B35/46
主分类号
C04B35/46
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