The alarmlight of the utility model can save energy and has a long service life.
本实用新型的警示灯节省电能，使用寿命长。
2
When the fume exhaust falls below a preset safety level, the alarm will sound and the alarmlight will come.
当通风柜排风量降至预设的最低排风量之下时，需产生声光报警。
3
The floatage state and Load rule of the buoy is analyzed. The causes are found of the buoy submersing in seawater, the alarmlight signal ghosting and the buoy cable breaking off.