tunnel borertunnel boring machine隧道: tunnel; tunneling; tunnellin ...开凿: dig; cut; cutting机: machine; engine隧道开凿: tunnel driving; tunnel excavation开凿机: excavator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:隧道开凿机,即可在微信中查询翻译