... sleet accident冰棱事故 sleet covering覆冰 sleet load冰雪负荷 ...
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The running safety of line was threatened by insulator sleet covering flashover derault of line at the late of 1998.
1998年底阳泉地区发生线路绝缘子覆冰闪络故障，对线路安全运行造成了威胁。
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