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发明名称
Improvements in spectacles
摘要
申请公布号
GB340480(A)
申请公布日期
1930.12.29
申请号
GB19290026049
申请日期
1929.08.27
申请人
WILLIAM DAVID EGLINTON
发明人
分类号
G02C5/02;G02C5/12
主分类号
G02C5/02
代理机构
代理人
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地址
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