Alarm indication signal (AIS) should be progressive response, light first and then sonance follows, the time interval should be 15 secs.
告警信号逐级相
,
后声,时间间隔为15秒。
Alarm indication signal (AIS) should be progressive response, light first and then sonance follows, the time interval should be 15 secs.
告警信号逐级相
,
后声,时间间隔为15秒。
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