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发明名称
摘要
申请公布号
GB1295578(A)
申请公布日期
1972.11.08
申请号
GBD1295578
申请日期
1971.04.19
申请人
发明人
分类号
G03B7/083
主分类号
G03B7/083
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代理人
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地址
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