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经营范围
发明名称
Personen-Rufanlage mittels HF-Funkrufsignalen
摘要
A central call station is connected to a plurality of transmitters successively triggered to transmit a high frequency call signal for a predetermined time with each transmitter triggered by the preceding transmitter through connecting wires.
申请公布号
DE2148989(A1)
申请公布日期
1972.04.20
申请号
DE19712148989
申请日期
1971.09.30
申请人
CHARBONNAGES DE FRANCE
发明人
分类号
G08B3/10
主分类号
G08B3/10
代理机构
代理人
主权项
地址
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