rheostatic control的用法和樣例：
例句
- The rheostat is operated by rotating the control knob, separating it from the push-pull action of the main lighting switch.
可變電阻器由旋轉的控制手柄操縱，與燈光總開關的推一拉的操縱是分開的。 - Some switches also contain a rheostat to control the brightness of the instrument panel lights.
一些開關也包含一個可變電阻器，控制儀錶板燈的燈光亮度。
