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发明名称
Improvements in screens for lamps
摘要
申请公布号
GB532544(A)
申请公布日期
1941.01.27
申请号
GB19390024730
申请日期
1939.08.28
申请人
GEORGE CRESSWELL
发明人
分类号
F21L19/00;F21V9/00
主分类号
F21L19/00
代理机构
代理人
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