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发明名称
Improvements in or relating to miners' safety helmets
摘要
申请公布号
GB476064(A)
申请公布日期
1937.12.01
申请号
GB19360019350
申请日期
1936.07.13
申请人
RICHARD ARCHIBALD BATHGATE
发明人
分类号
A42B3/22
主分类号
A42B3/22
代理机构
代理人
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地址
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