Correct

套筒

/ tàotǒng / 
Strokes

Definition

sleeve/a tube for wrapping

Example

As a Noun

sleeve (piece); jacket; muff; bushing

1
Ràozǔ
绕组
tàotǒng
套筒

coil sleeve

2
Qìgāng
汽缸
tàotǒng
套筒

cylinder sleeve/jacket

3
Tàotǒng
套筒
jiētóu
接头

sleeve joint