1)pravity,障碍，故障2)mischance,障碍，故障，损害3)malfunction,n.故障;功能碍障4)fault and obstacle,事故和障碍5)balk,故障，阻碍，障碍，[突然]卡住6)malfunction,失灵，故障，机能障碍
用法和例句
In statistics of fault and obstacle of transformer, the faults and obstacles related to bushing also take considerable proportion, and along with the raising of voltage grade, the proportion taken increases continuously.