The common commerical frequency voltage test apparatus are divided into two categories, namely the traditional step up transformer system and series resonance system.
常见的工频耐压设备大致可分为两类：传统的升压变压器系统和串联谐振系统。
The common commerical frequency voltage test apparatus are divided into two categories, namely the traditional step up transformer system and series resonance system.
常见的工频耐压设备大致可分为两类：传统的升压变压器系统和串联谐振系统。
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