The utility model can obviously improve the power factor of the ac arc welder to achieve the purpose of saving energy.
本实用新型可以明显提高交流弧焊机的功率因数，达到节约能源的目的。
The utility model has the advantages of power saving, work efficiency improvement, service life of the machine parts extension, etc.
本实用新型具有节省动力，提高工作效率，延长机件寿命等优点。
The utility model can solve the problem of crop irrigation in hilly area, with effects of saving water source and human power reached simultaneously.
本实用新型可解决丘陵地区农作物灌溉的问题，同时达到节约水源、节省人力的效果。
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