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隔离开关是用于把高压设备与电源隔离的电器。()

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低压接触器主要用来控制电动机。()

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变压器的效率指的是变压器的输入有功功率占输出有功功率的百分比。()

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What task was completed by the Devonshire Apartment Management Office in the past 3 months？

A. Purchasing new furnace systems for all tenants
B. Replacing furnace filters at no cost to residents
C. Improving the electrical wiring system in the office park
D. Installing new water faucets in every apartment

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三相芯式变压器具有结构紧凑和高效经济的优点。()

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