alarm handsetting stem spring

例句：

1. 1. The alarm system was designedto prevent accidents in the factory.
   这个警报系统被设计用来防止工厂的事故。
2. 2. Thesecurity guard was alerted by the alarmhand setting.
   保安被警报装置提醒了。
3. 3. Thenew safety device is a perfect solution forthis problem.
   这个新的安全装置是解决这个问题的完美解决方案。