Results indicate that when the doublecontainer car enters into a tunnel, the pressure drag of the doublecontainer car quickly rises, and then rapidly falls.
测试结果表明：双层集装箱车辆进入隧道口时，空气压差阻力急剧上升，之后又迅速回落；
2
Double-stack container trains are the new railway products which can increase transport capacity with higher speed and lower unit operating cost.
铁路双层集装箱运输是一种运输速度快、运输费用省、单位运营成本低、能使运能提高的铁路货运新产品。
3
An insulated container used especially to store liquefied gases, having a double wall with a vacuum between the walls and silvered surfaces facing the vacuum.