: 球形把手 （机器等）旋钮 
bouton ☊ 
button, knob, spot 
按钮 
Knopf like: knob → →
bamboo hat worn by Buddhist monks (with a long ribbon and a small knob on top) ☊ 
nón tu lờ ☊ This knob controls the volume. ☊ control ☊
Twist the knob to the left to open the door. ☊ twist ☊
bouton ☊ elle pressa le bouton qui commande l’ouverture de la porte ☊