（大熊座内的）北斗七星

wagon

wagon

drill wagon (drill carriage)

low-loader wagon

side discharging car【车辆】;side dump car【车辆】;side-tip wagon【车辆】

tower car (tower wagon)

special wagon for transporting heavy-duty loads

truck-mounted drill rig【机】;truck-mounted rig【机】;wagon drill【机】