旋钮

This knob is only held on by sellotape.

个旋钮只是用透明胶带固定住的。

This machine has lots of knobs on it. Which one starts it?

机器有许多旋钮。哪一个是启它的？

My radio's knob got loose.

我收音机上的旋钮松了。

Turning the knob fully counterclockwise (to OFF) allows the gate to pass signals unattenuated, effectively bypassing the gate.

逆针旋转旋钮直到OFF,样，允许信号毫无衰减地通过，有效地直通。