flattening machine的用法和样例：
例句
- The straightening principle and the calculation method for the force and power of this straightening machine is discussed.
并论述了该矫直机的矫直原理及力能参数的计算方法。 - The straightness error mathematics model has been built, then the measuring and controlling system of redirector rack automatic straightening machine has been developed.
建立直线度误差的数学模型，研制全自动校直机测控系统，并用于轻型汽车和轿车的转向器齿条的检测和校直。
