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发明名称
Improvements in miners' safety lamps
摘要
申请公布号
GB474263(A)
申请公布日期
1937.10.28
申请号
GB19360017503
申请日期
1936.06.24
申请人
ERNEST ARTHUR HAILWOOD
发明人
分类号
F21L23/00
主分类号
F21L23/00
代理机构
代理人
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