This study aims at investigating the lock-in phenomenon, fluctuating lift and the phase shift between fluctuating lift and displacement of the oscillating cylinder.

文章重点研究了较高振幅振动柱的锁定现象、波动升力与柱位移之间的相位变化，讨论了方柱涡激振荡、驰振和气动稳定性问题。

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Safety features including: identifying trees, rocks and obstacles, sensor equipped bumpers, mower lift detection and child lock.

安全装置有：识别树枝、石头、障碍物； 具有缓冲特征的传感器； 割草机升降装置以及儿童锁。

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Safety legs and lift lock out pins.

安全的木头支架和升降式的止动销。

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She said Mr Thompson had failed to lock the lift and that necessary safety checks would have taken seconds to carry out.

BBC: Death fall lift 'was unlocked'