knob insulator[电] 鼓形绝缘子;[电] 瓷柱;瓷珠;瓷柱
flush knob冲洗按键
knob wiring[电] 瓷柱布线;瓷柱布线
knob handle球形手柄
sash knob门框上球形把手
Knob Mode设定旋钮功能
compensator knob补偿器旋钮
switch knob[电] 开关旋钮;开关把手;开关手柄;扳钮
filter knob滤光镜铵钮;红外干涉
N-COUNT（可数名词） A knob is a round handle on a door or drawer which you use in order to open or close it. 球形把手
He turned the knob and pushed against the door.
他转动门把手，推了那扇门。
N-COUNT（可数名词） A knob is a round switch on a piece of machinery or equipment. 旋钮
...the volume knob.
…音量旋钮。