trackagen.轨道总称(铁路线全长)trackn.轨道；跑道；踪迹；小路；乐曲v.追踪；跟踪tracking and aiming跟踪和瞄准track autoradiogram径迹放射自显影像(照片)tracking resistance防跟踪性tracking indication跟踪显示track transformator拨轨变压器trackless transport无轨运输track electromagnet轨道感应电磁铁track guiding wheel履带导向轮tracklaying tractor链轨式拖拉机track-mounted rig自行式履带钻机