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经营范围
发明名称
Improvements in and relating to electric torches
摘要
申请公布号
GB762925(A)
申请公布日期
1956.12.05
申请号
GB19540031814
申请日期
1954.11.03
申请人
YEN TING SHEN
发明人
分类号
F21L4/00
主分类号
F21L4/00
代理机构
代理人
主权项
地址
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