pump transmission

• 泵的传动

pump transmission的用法和样例：

例句

1. And did you want an automatic or a manual transmission?
   还有你是要自动的还是用手操作的传动系统。
2. A transmission that automatically changes the gears according to the speed of the car.
   依照汽车的速度自动改变档位的传动装置。