The installation of a good guide rail lift in the use of the site before the safety engineer acceptance, and to permit the use of the license plate can be put into use.

安装好的导轨式升降机在使用前由现场安全工程师验收合格，并挂准许使用牌后方可投入使用。

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It took more than 300 years and many more failed experiments until Sir George Cayley, a British engineer, determined that flight required lift, propulsion, and control.

300年后，一位英国工程师乔治·凯利在经过了无数次失败的实验后，终于得出了一个重要的结论：飞行需要抬升力、推进力和控制力。

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The jury at Newcastle Crown Court heard Mr Thompson worked as a "highly experienced" lift engineer for more than 40 years, 17 of those working for Derwent Lift Services Ltd.

BBC: Death fall lift engineer was 'highly experienced'

Prosecutor Susan Hirst said the lift had been out of service for two days while the engineer waited for spare parts.

BBC: Death fall lift 'was unlocked'

An engineer has been cleared of a safety breach after a 92-year-old woman fell into a lift shaft and died.

BBC: Heathdale Rest Home in Whitley Bay