Finally, he narrowed it down to the fan belt.
最后，他将范围缩小到风扇皮带。
Fan belt
原声例句
2005 ESLPod
漫长的告别（上）
I called it a loose fan belt and the hell with it.
我称它为松动的风扇皮带， 见鬼去吧。
切达科学解读
Before metrication, GM had over 900 fan belts of various sizes in their supply chain.
在公制化之前，通用汽车的供应链中有 900 多条不同尺寸的风扇皮带。
2005 ESLPod
I explained to Manny my problem, and he " narrowed it down to the fan belt."
我向曼尼解释了我的问题， 他“将范围缩小到风扇皮带” 。
Engvid-Adam-课程合辑
Fan belt, make sure you have a fan belt;make sure it's not scratched, make sure it's tight enough.
风扇皮带，确保你有风扇皮带； 确保它没有被划伤，确保它足够紧。
2005 ESLPod
Now, the " fan belt" is the part of the car that connects the motor to a " fan." You know what a " fan" is – that spins around to keep you cool.
现在，“风扇皮带”是连接电机和“风扇” 的汽车部件。 您知道“风扇” 是什么——它旋转来让您保持凉爽。
中文百科
带 (机械) Belt (mechanical)
（重定向自Fan belt）
带，也称传动带或皮带，是一种环状柔性材料，用于机械连接两根或以上的传动轴。带可以用于传递动力，也可以用来传递运动，即相对位移。带安装在带轮上。在双带轮系统中，带轮的转向可以相同，也可以通过交叉带的方向来使两带轮的转向相反。
作为动力源，传送带是带在两点间输送物体的一个应用。
英语百科
Belt (mechanical) 带 (机械)
（重定向自Fan belt）
A belt is a loop of flexible material used to link two or more rotating shafts mechanically, most often parallel. Belts may be used as a source of motion, to transmit power efficiently, or to track relative movement. Belts are looped over pulleys and may have a twist between the pulleys, and the shafts need not be parallel. In a two pulley system, the belt can either drive the pulleys normally in one direction (the same if on parallel shafts), or the belt may be crossed, so that the direction of the driven shaft is reversed (the opposite direction to the driver if on parallel shafts). As a source of motion, a conveyor belt is one application where the belt is adapted to carry a load continuously between two points.