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发明名称
摘要
申请公布号
GB1296291(A)
申请公布日期
1972.11.15
申请号
GBD1296291
申请日期
1971.02.24
申请人
发明人
分类号
G03G5/087;G03G5/05
主分类号
G03G5/087
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代理人
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