The damage cause of reduction gear of cooling tower fan is analyzed, some countermeasures are adopted.

分析凉水塔风机减速箱齿轮损坏的主要原因，采取相应的防范措施。

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When the towers is under load, the central pole is lifted and the running gear of the tower is also lifted from the top of the track.

当塔架作业时，中心立柱将被顶起，塔架的走行结构也将被顶离轨顶。

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TOWER: PH-ABC, check you have the gear down?

塔台：PH - ABC请确认你的起落架放下了吗？

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Officials in the tower said the plane was too high and did not have its landing gear down as it approached the airport.

CNN: One killed in California plane crash