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发明名称
Optical toy
摘要
申请公布号
GB359688(A)
申请公布日期
1931.10.29
申请号
GB19300030562
申请日期
1930.10.13
申请人
CARL ARNOLD
发明人
分类号
G02B27/06
主分类号
G02B27/06
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