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经营范围
发明名称
Improvements in periscopes
摘要
申请公布号
GB754688(A)
申请公布日期
1956.08.08
申请号
GB19540027419
申请日期
1954.09.22
申请人
JOHN POST
发明人
分类号
G02B23/08
主分类号
G02B23/08
代理机构
代理人
主权项
地址
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