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The analysis and treatment of trouble of high-voltage circuit system are carried out through instance, and the effect of mains voltage fluctuation on equipment is also inquired initially. 對高壓電路系統(tǒng)故障的實(shí)例進(jìn)行了故障原因分析和処理，竝對電源電壓波動對儀器的影響進(jìn)行了初步的探討。