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发明名称
Fire alarms
摘要
申请公布号
US2938493(A)
申请公布日期
1960.05.31
申请号
US19560566811
申请日期
1956.02.21
申请人
PRATT EDMUND C
发明人
PRATT EDMUND C.
分类号
G08B17/02
主分类号
G08B17/02
代理机构
代理人
主权项
地址
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