sleepern.睡眠者;枕木;卧铺;爆冷门;耳环
sleeper renewal轨枕更新
sleeper pincers枕木钳
sleeper aeroplane[机] 卧座飞机
sleeper fastening轨枕扣件
Sleeper structure卧铺结构
sleeper occupancy床位占有率
sleeper screw bolt枕木螺栓
sleeper maintenance轨枕养护
sleeper replacement轨枕更换
sleeper joint plate枕木接合板,底梁接合板