remote supervision of level crossings平: flat; level; even; smooth口: mouth的: 4次方是 The fourth power of 2 i ...远程: long-range; long-distance; r ...管理: manage; run; administer; sup ...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:平交道口的远程管理，即可在微信中查询翻译
