special personal protective devices 特种劳动防护用品
reducing exposure (both occupational and recreational) to loud noises by using personal protective devices and by engineering noise control.
通过使用个人保护装置以及噪音控制工程，减少接触噪音时间。
The incorrect reclose of line protective devices in electric power system will result in personal injuries and system accidents.
电网中运行的线路保护装置的重合闸误动作，将会引起人身以及电网事故。
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