cleaner height adjustment knob – Definition, Pronunciation & Pictures

cleaner height adjustment knob /ˈkliːnə ˈhaɪt ɐdʒˈʌstmənt ˈnɒb/ n

中文：高度调节旋钮

Meaning：Mechanism for controlling brush height depending on the thickness of the rug or pile carpet to be cleaned.

Found in these illustrated scenes（1）