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发明名称
Combined audio program and alarm signaling system with line supervision
摘要
申请公布号
US3401234(A)
申请公布日期
1968.09.10
申请号
US19650448695
申请日期
1965.04.16
申请人
RIMAC, LTD.
发明人
HEALD ROSS M.
分类号
G08B25/08
主分类号
G08B25/08
代理机构
代理人
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地址
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