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在高温季节里,电风扇是一种重要的降温工具。它有固定式和摇头式等式样;摇头式的也只能在180°范围内转动。但由一般电动机改装成的电风扇,通常是固定式的。我厂保安技工许文甫师傅最近把这种电
In the hot season, electric fans are an important cooling tool. It has a fixed and shaking head style; shaking head type can only be rotated in the range of 180 °. However, converted from a general electric fan motor, usually fixed. Xu Wenfu, a mechanic in our factory, recently put this kind of electricity