AC manual regulator的用法和样例：
- Electromagnetic dosing pump with MANUAL regulation with digital display.
- Electromagnetic dosing pump with MANUAL regulation by means of a potentiometer.
- During repairs regulation can be obtained by manual regulation of the by-pass valve.
- By different nitrogen treatments and manual regulation ofsource-sink ratio, dynamic states of bleeding at neck-panicle node and basal internode of rice were studied.