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经营范围
发明名称
Improvements in or relating to alarm-devices, more particularly for air raid alarm
摘要
申请公布号
GB488442(A)
申请公布日期
1938.07.07
申请号
GB19370005320
申请日期
1937.02.22
申请人
ERNST BUNZL
发明人
分类号
G08B27/00
主分类号
G08B27/00
代理机构
代理人
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