alternation current 双语例句
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1·Through the positive and negative alternation of the non ferrous metal liquid, the liquid metal can generate eddy current in the process of positive and negative inversion.
通过对有色金属液体的正反转交替搅拌,使有色金属液体在正反转过程中产生涡流,可获得充分均匀的搅拌效果。