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 parameters provided by this new processor can be divided into two general classes: time analysis signatures and their related frequency analysis signatures.
这一新的处理器所提供的参数可分为两大类：签名时间分析及其相关频率分析签名。
From the digital image processing knowledge, the enhanced process can generally be divided into two categories, one is the frequency domain processing and the other is spatial processing.
从数字图像处理知识知道，增强处理一般可以分为频域处理方法和空域处理方法两大类。
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