Others may be familiar with simple pumps or commonpump motors.
其他人可能会对简易水泵或普通水泵发电机比较熟悉。
2
For example, some individuals from rural communities may be experts at digging and maintaining Wells. Others may be familiar with simple pumps or commonpump motors.
比如，一些从农村来的人可能擅长挖井、修井，还有一些人可能会使用简易水泵或普通的水泵发电机。
3
The results show that for the commonpump control methods, the third power relation between the pump rotate speed(water volume) ratio and the shaft power ratio is not true;