bushing

n. 轴衬, 套管
【化】 衬套; 管衬; 轴瓦

bush.ing

n.（名词）
A fixed or removable cylindrical metal lining used to constrain, guide, or reduce friction.
衬套，套管：一种固定或可移动的圆柱形金属套管，用来压紧、引导或减小摩擦
Electricity An insulating lining for an aperture through which a conductor passes.
【电学】 绝缘套管：为导体的通过提供缝隙的绝缘套管
An adapter threaded to permit joining of pipes with different diameters.
导线套管：允许不同直径的导线形成的导线束通过的衬套

来源：
From bush 2
源自 bush2