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发明名称
Improvements in military helmets
摘要
申请公布号
GB520989(A)
申请公布日期
1940.05.08
申请号
GB19390005273
申请日期
1939.02.17
申请人
JOHN OSWIN;GEORGE ORMEROD
发明人
分类号
A42B3/04
主分类号
A42B3/04
代理机构
代理人
主权项
地址
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