economizer relay
... economizer hopper 省煤器灰斗 economizer relay 节电继电器 economy 经济,节省 ...
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自动电压调节继电器 automatic voltage regulating relay
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提出一种串联电池组电压测量新方法:光电继电器取代机械继电器选通各节电池电压;
The paper puts forward a new method to measure series battery voltage, mechanical relay is replaced by photoelectric relay to select each battery voltage.
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