[铁路] 轮缘踏面宽度 tread width: 楼梯级宽; 踏板宽度; 踏步宽度; 胎面宽度; 梯面宽度wheel tread: 轮接触面, 轮距; 胎面buffed tread width: 磨胎面宽度tread arc width: 胎面弧宽tread chord width: 胎面弦宽下载手机词典可随时随地查词查翻译