常見例句雙語例句Objective To study measures of reducing air pollution in the tunnels which are used the method of trackless transportation to construct.目的研究降低無軌運輸方式施工隧道中空氣污染的措施。The main methods of mucking in tunnel construction with drill and blast method is track-bound transportation system and trackless transportation.鉆爆法施工時，隧道出碴運輸?shù)闹饕绞綖橛熊夁\輸和無軌運輸。At the same time, it points out several problems on developing of brakes for the coal mine underground trackless auxiliary transportation vehicles that should pay attention to.同時指出了在開發(fā)研制煤礦井下無軌輔助運輸車輛制動器時應(yīng)注意的幾個問題。 返回 trackless transportation