利物浦

Approximately five weeks in the autumn when leaves fall on the track requiring measures to assure adhesion.

" class="glossaryLink ">落叶

污染:某些类型的树叶在轨头和车轮之间被碾碎，会导致残留在铁轨上，造成车轮打滑、制动受损和轨道电路运行失灵等问题。