还包括一次起落架收放系统的故障分析。
It also states a troubleshooting analysis of the undercarriages retractile system.
无人机起落架设计所涉及的相关构件、机构通常包括：缓冲支柱、机轮、轮胎、刹车防滑系统、操纵减摆机构、收放机构等。
The relevant organizations involved usually include absorbing system, undercarriage tyre, brake slip resistance system, landing gear shimmy dampers, retracting-lowering system, etc.
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