;
士;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，先光后声，时
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，先光后声，时15秒。
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