An automatic control system for chemical injection into feedwater is designed, using KMM single loop programmable controller.
设计了给水加药自动调节系统，并给出了用KM M单回路可编程调节器实现的方法。
2
All weld thing to welding firm can be used for the cultivation of the weaning piglets, exercise automaticwater, free to feed themselves.
所有焊合件要焊接牢固可用于断奶仔猪的培育，实行自动饮水，自由采食。
3
The structure and feature of the automatic control floating ion exchanger are introduced. The application of this ion exchanger to desalting system of industrial boiler feedwater was reported.