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采用一种全新的控制方法,将交流弧焊器所提供的特种电源转换成汽车修理所需的可控直流电源,是一种具有实用价值的尝试。
It's a very practical attempt adopting wholly new control method change the special power afforded by the A. C. arc welder to the controlled D. C. power required in automobile maintenance.
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