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根据抽油机的实际运行，采用电动机△－Ｙ切换技术自动根据负载的变化进行切换，从而节省了电能、提高了效率、改善了功率因数。
According to the actual operation of the pumping unit, the motor △ -Y switching technology automatically switches according to load changes, thus saving energy, improving efficiency and improving the power factor.