工学 用电安全技术 释 protective earthing 保护接地 将电气设备的某些部分用导线（接地线）与埋设在土壤中或水中的金属导体（接地体）相连接的做法。又称安全接地。
计算机硬件 计算机工程设计 释文 protective earthing 保护接地
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