基于这些原因，所有这些荧光灯镇流器没有明确标示“无多氯联苯”必须被怀疑含有多氯联苯。
For these reasons, all fluorescent lighting ballasts which are not specifically labeled "no PCBs" must be suspected to contain PCBs.
今天的紧凑型日光灯电子镇流器已切换迅速，没有喧嚣。
Today's compact fluorescents have electronic ballasts that switch on quickly and don't buzz.
这种镇流器在没有功率因数调节器的情况下能产生高功率因数和低谐波率。
Under condition of no power factor regulator, it can generate high power factor and low harmonic rate.
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