The secret of the elevator/电梯的秘密

This book mainly introduces the operating principles and safety protection measures of elevators. The plot setting in the book focuses on combining the current development trends of the elevator industry. For example, it introduces the safe use of elevators, in addition to conventional fires, earthquakes, etc., and also adds precautions for riding elevators during public health emergencies.

本书主要介绍了电梯的运行原理和安全保护措施。书中的情节设置注重结合当下电梯行业发展趋势，如介绍安全乘坐电梯时，除常规的火灾、地震等，加入了突发公共卫生事件时乘坐电梯的注意事项。