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For these reasons, all fluorescent lighting ballasts which are not specifically labeled "no PCBs" must be suspected to contain PCBs.
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。
Railway applications - Rolling stock - D. C. supplied electronic ballasts for lighting fluorescent lamps.
铁路设施。机车车辆。照明荧光灯用直流电子镇流器。
Fluorescent lighting ballasts-to be one of the important branches of the applications of PIC- have symbolized the harmonic combination of the Controlled IC and Power IC within a single chip.
作为功率集成电路运用的一个重要分支，荧光灯镇流器芯片在其实现上充分体现了控制集成电路与功率器件在单一芯片上的有机结合。
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