Aiming to these shortcomings, we have performed improvement and optimal design for traditional impulse power supply unit.
我们针对上述缺陷，对传统脉冲电源进行了改造、优化设计。
And some foreign power supply units for electroplating also have certain disadvantages, such as limited adjustable range of impulse width, and non-adjustable impulse frequency.
某些国外电镀电源虽然也实现了程控，但也存在一定的缺陷，如脉宽调节范围较窄，脉冲频率不可调等。
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