guard device meaning in English

保护装置

Operating , testing and safe - guarding devices for work on electrically energized systems with nominal voltages exceeding 1 kv ; phase comperators
在标称电压大于1kv的带电设备上工作使用的检验和安全
Vde specification for operating , testing and safe - guarding devices used when carrying out live - line - work on equipment with rated voltages exceeding 1 kv ; part 3 : fuse tongs
在额定电压大于1kv的带电设备上工作时进行操作试验
Operating , testing and safe - guarding devices for work on electrically energized systems with rated voltages exceeding 1 kv ; part 1 : general requirements for the parts 2 to 4
在额定电压大于1kv的带电设备上操作试验和安全防
Vde specification for operating testing , and safe - guarding devices used when carrying out live - line - work on equipment with rated voltages exceeding 1 kv ; part 2 : operating rods
在额定电压大于1kv的带电设备上工作时进行操作试验