给油箱加油时，等待膨胀箱加满和把燃油加到加油口处的作法是不正确的。
Filling the tank, waiting for the expansion tank to fill, and then topping off the filler neck is improper fueling procedure .
检查油箱底部放油口是否已关闭，确定关闭后再打开油箱顶部加油口密封盖。
Need to check the oil box's bottom which outlet whether closed or not, after closed surely then open the top of oil box and add the sealing cover for the top orifice.
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