The major way to improve the linear precision of Rotary Synthetic Carbon Film Potentiometer is to trim resistance using the advanced equipments.

提高回转式合成碳膜电位器线性精度的一种方法就是利用先进的设备，采取修刻电阻体的方式来改善电位器的输出特性。

youdao

Low-voltage stepper motors, Japan THK's high precision guide linear, precision ball screw with the rotation. Single-axis CNC system operation, smooth running durable.

低压步进电机，日本THK高精度直线导轨， 精密滚珠丝杠配合转动。单轴数控系统操作，运行平稳，经久耐用。

youdao

Coupled with the use of ultra-linear neodymium magnets and precision damping this ensures smoother motion and therefore a more accurate, natural sound.

ENGADGET: Bowers & Wilkins kicks out P3 headphones, brings upscale sound to the commoners (update)