保护装置

例句：

1. 1. The safety of the workers is protected by the protective device.
   工人的安全由保护装置来保障。
2. 2. The new invention provides a safeguarding apparatus for the environment.
   这项新发明为环境提供了一种保护设备。
3. 3. The company has installed several protective devices in its factories to prevent accidents.
   该公司在其工厂安装了几种保护设备，以防止事故的发生。