n.滑轮(组),滑车( pulley的名词复数 );皮带轮;
例句:
A pulley or a system of pulleys set in a casing.
滑轮,滑轮组安装在机械外壳中的滑轮或滑轮组.
a system of ropes and pulleys
绳索滑轮系统
The lifting device is a system of ropes and pulleys.
这种起重装置是由缆索和滑轮组成的.