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发明名称
Unit for viewing areas with limited access
摘要
申请公布号
GB2072374(A)
申请公布日期
1981.09.30
申请号
GB19810008277
申请日期
1981.03.17
申请人
BOSMAN F A
发明人
分类号
G02B7/182;(IPC1-7):G02B23/02
主分类号
G02B7/182
代理机构
代理人
主权项
地址
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