an insulating liner in an opening through which conductors pass
a cylindrical metal lining used to reduce friction
bushing的用法和样例：
例句
用作名词 (n.)
Determine the proper bushing length from the thickness of the center member to be inserted between the friction facings. 由设于摩擦板间的中心构件厚度，决定正确的轴衬长度。
Grease from a standard grease fitting is distributed to the shaft through a groove in the outside diameter of the bearing and from radial holes in the bushing's well. 从标准润滑油嘴注入的润滑油通过轴承外径的环形槽分流到阀轴上，并且从径向孔流入轴衬壁上。
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