[db:国别翻译]美国米勒电气制造公司

上海仪舶实验室自动化 25-08-15 16:12:20

/9-9-I-9M-9M-9-9A-9-9G-9G-9E-1/

在1920年代,几乎所有的电弧焊接都是使用DC输出的大型,昂贵的三相发电机进行的。 在当时的三相力量非常有限,通常仅在大城市可用。 因此,农村地区的大多数铁匠仍在使用古老的锤子和锻造技术来焊接金属。

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