horse-shoe tunnel arch tunnel拱形: arcuation; arch; arched隧道: tunnel; tunneling; tunnellin ...环形隧道: loop tunnel矩形隧道: rectangular section tunnel马蹄形隧道: horse shoe tunnel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:拱形隧道,即可在微信中查询翻译