Correct

滑轮

/ huálún / 
Strokes

Definition

block and tackle

Example

As a Noun

pulley; block; sheave; glidewheel

1
Dòng
动
huálún
滑轮

movable pulley

2
Dìng
定
huálún
滑轮

fixed/fast pulley

3
Huálúnzǔ
滑轮组

block and tackle; pulley block

4
Huálún
滑轮
è
轭

pulley fork