Correct

滚筒

/ gǔntǒng / 
Strokes

Definition

roller/cylinder (machine part)/drum

Example

As a Noun

cylinder; rotary drum; roller

1
Gǔntǒngshì
滚筒式
xǐyījī
洗衣机

tumble washing machine

2
Gǔntǒngshì
滚筒式
hōnggānjī
烘干机

tumble/tumbler drier