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经营范围
发明名称
Improvements in apparatus for directional illumination
摘要
申请公布号
GB360664(A)
申请公布日期
1931.11.12
申请号
GB19300033160
申请日期
1930.11.04
申请人
THE GENERAL ELECTRIC COMPANY LIMITED;EDGAR LANGLEY RANDALL
发明人
分类号
F21S8/00
主分类号
F21S8/00
代理机构
代理人
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