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发明名称
摘要
申请公布号
GB1230085(A)
申请公布日期
1971.04.28
申请号
GBD1230085
申请日期
1967.07.05
申请人
发明人
分类号
G02B27/00;G02B27/01
主分类号
G02B27/00
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