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发明名称
Inspection periscope
摘要
申请公布号
US1907314(A)
申请公布日期
1933.05.02
申请号
US19300488219
申请日期
1930.10.13
申请人
BAER EMANUEL H
发明人
BAER EMANUEL H.
分类号
G02B23/24
主分类号
G02B23/24
代理机构
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