hotbox

详细解释:n. 热轴

英语解释：

名词 hotbox:

a journal bearing (as of a railroad car) that has overheated

详细解释：

hot.box

n.（名词）
An axle or journal box, as on a railway car, that has become overheated by excessive friction.
热轴：由于过分摩擦而变得过热的轮轴或轴颈箱，如火车上的