线轴跟的英文：
spool （女高跟鞋鞋跟的一种）

spool是什么意思：
n. 线轴，卷轴，缠线框，线轴状物
v. 缠绕；卷在线轴上

a piece of; a reel of; a bolt of; a spool of
一卷

The tin wire was spooled after it was used.
焊丝用完后已卷绕起来了。

There were only two rings of rope spooled on the drum.
只有两圈绳子绕在卷轴上。

We spooled the rope off the drum, and put it down the hill.
我们把绳子从卷轴上绕下来，顺到了山下。

The film fly off the spool and wind itself round the projector.
电影胶片从卷轴滑出缠绕在放映机上了。