undercarriage
英 美
The undercarriage was fully retracted.
起落架被完全收起。
The pilot found that the undercarriage could not be retracted.
驾驶员发现飞机的起落架不能缩回。
All it requires are some minor changes to the front undercarriage.
唯一要做的不过是对前起落架做一些微小的改动。
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