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发明名称
Improvements in and relating to spectacle lenses having areas of different focal power and spectacles incorporating the same
摘要
申请公布号
GB9609813(D0)
申请公布日期
1996.07.17
申请号
GB19960009813
申请日期
1996.05.10
申请人
BUSH, SIDNEY J
发明人
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主分类号
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