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经营范围
发明名称
Improvements in magnifying spectacles
摘要
申请公布号
GB877194(A)
申请公布日期
1961.09.13
申请号
GB19590025914
申请日期
1959.07.28
申请人
TONG KWOK WAH
发明人
分类号
G02C7/08
主分类号
G02C7/08
代理机构
代理人
主权项
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