Analog signalboard mainly detects current signals, voltage signals and implements fault protect.
模拟接口完成电流、电压检测及保护等功能。
2
Mainly described are the working principles and structure features of the number marking device for the computer-controlled signalboard.
主要介绍了微机控制标志板打号机的工作原理及结构特点。
3
The invention discloses a water-level detection sensor for a solar water heater, which comprises floats, a sensor seat, a signalboard and a protection hood.