体彩排列5号码遗漏

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电焊机的优点和缺点

作者:更新时间:2019-05-17 11:51:28浏览次数:
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    电焊机利用瞬时短路中由正极和负极产生的高温电弧来熔化焊料和待焊接在电极上的材料,以使待接触的物体结合。它的结构非常简单,它是一个大功率变压器。

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