1. warning device

1. 报警装置：warning 警报 | warning device 报警装置 | warning lamp 警报灯

2. 警报装置：warning 警报 | warning device 警报装置 | warning laser radar 报警激光雷达

3. 警告装置：voltmeter calibration 电压表校准 | warning device 警告装置 | Warning lamps of emergency motor vehicles 应急用车闪光灯

4. 报警[警报]装置,报警器：warning buzzer 报警[警告]蜂鸣器 | warning device 报警[警报]装置,报警器 | wet type cleaner 湿[油浴]式滤清器

1. a device that signals the occurrence of some undesirable event

    Synonym: alarmalarm system