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发明名称
Improvements in or relating to visual indicating devices
摘要
申请公布号
GB480533(A)
申请公布日期
1938.02.22
申请号
GB19360023117
申请日期
1936.08.22
申请人
LOUIS VAN BULCK
发明人
分类号
H03J1/10
主分类号
H03J1/10
代理机构
代理人
主权项
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