Acoustic, optical alarm signals and identifying ind. 船舶聲光報警信號和識別標志。
Preserve alarm value, when the number value of the vibration and temperature exceeds prewarning, use sound and light to report to the police. 預設報警值，當振動(dòng)和溫度的數值超過(guò)預警時(shí)，即用聲光報警。
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