Push the tiny lever on the lock and let the door lock itself.

推锁上的小控制杆，让门自动锁上。

《柯林斯英汉双解大词典》

After completing adjustments, tighten the lock nut and replace the fast fill lever cap.

在调节完成后，紧固锁紧螺母，重新安装快速进水手柄帽。

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The lock stops the quick release lever from opening fully.

安全锁能防止快速释放操纵杆完全打开。

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Mr Ash said it was possible he did not lock a reversing lever into place, which could have prevented the locomotive from slipping between forward and reverse.

BBC: North Yorkshire Moors Railway guard crushed by train

Mr Ash, a retired professional train driver with more than 50 years' experience, said it was possible he did not lock a reversing lever into place, which could have allowed the locomotive to slip between forward and reverse.

BBC: North Yorkshire Moors Railway death: Family to sue

Chris Hall, of the Rail Accident Investigation Board, said that Mr Lund would have had "no reason to believe" the train would change direction, which was most likely caused by the driver forgetting to lock the reverse lever.

BBC: North Yorkshire Moors Railway death: Family to sue