An emergency extension system extends the gear mechanically if hydraulic or electrical power is lost.

如果液压系统或者电源出现故障，应急放出系统会靠重力机械地放出起落架。

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An emergency extension system extends the gear mechanically if hydraulic or electrical power is lost.

如果液压系统或者电源出现故障，应急放出系统会靠重力机械地放出起落架。

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