Results indicate that when the double container car enters into a tunnel, the pressure drag of the double container 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；
Results indicate that when the double container car enters into a tunnel, the pressure drag of the double container 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；
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