The disadvantage of class B operation is a large amount of "crossover distortion", which occurs when one tube of the push-pull pair cuts off and the other turns on.

的缺点B级操作大量的“交越失真” ，这发生在一个管推挽对切断和其他打开。

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SZKX series has self-cooling sealed structure and in use for B-class insulation material, so possesses features of less maintenance, reliable operation and long life.

本电动机采用封闭型自冷结构和B极构缘材料，维护少、运行可靠、寿命长。

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