normally deenergized track circuitnormally open track circuitopen type track circuit开路: open a way; blaze a trail; o ...式: type; style轨道: track; pathway; rail; runway ...电路: circuit; electric circuit; e ...闭路式轨道电路: close type track circuit; clsed type track circuit; clsedtypetrackcircuit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:开路式轨道电路，即可在微信中查询翻译
