subtraction controller

例句：

1. 1. The subtraction controller is used to calculate thedifference between two numbers.
   减法控制器用于计算两个数字之间的差。
2. 2. Thesubtraction controller wasdesigned to simplify calculations for engineers.
   减法控制器被设计来简化工程师的计算。
3. 3. The subtractioncontroller has been upgraded to improve accuracyand speed.
   减法控制器已被升级以提高准确性和速度。