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发明名称
Optical system
摘要
申请公布号
US1989317(A)
申请公布日期
1935.01.29
申请号
US19310560264
申请日期
1931.08.31
申请人
HARPER EARLE R
发明人
HARPER EARLE R.
分类号
G02B27/10
主分类号
G02B27/10
代理机构
代理人
主权项
地址
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