... over all 全部的 over and-under relay 过和低继电器 over bending 过度弯曲 ...
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under and over voltage relay 过不足电圧継电器
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WJJL1 intelligence over current relay is a typical electronic apparatus which has over current, short circuit, over voltage, under curent, phase faults and starting failure protective functions.
WJJL1智能过流继电器是典型的电子、电器技术相结合的产品。 具有过电流、短路、缺相、过欠压、欠电流、相失衡及启动故障等保护功能。
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