train speed monitoring device列车: train速度: velocity; speed; blast; bat检测: check; detection; test; gaug ...仪: appearance; bearing度检测仪: yb-ii下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:列车速度检测仪，即可在微信中查询翻译
