常見例句雙語例句Main duties of relay protection are correctly and quickly judging and clearing system faults, which greatly derive voltage sags in a distribution system.系統(tǒng)中大部分電壓跌落由故障引起，快速可靠地判斷竝切除故障是繼電保護(hù)的主要職責(zé)。 返回 clearing relay