以下为句子列表：
英文: This kind of on-load tap changer has the merits of advanced structure, operating reliably, long useful life and maintenance freely, It is suitable for oil-immersed three-phases transformer with frequency 50HZ, rated voltage 35KV and below and rated curren
中文: 统一设计的有载分接开关，具有结构先进，动作可靠，使用寿命长，维护方便等优点，适用与50HZ，额定电压在35KV及以下，额定电流在400A及以下的三相油浸式变压器。
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