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One good example is the conversion of iron ore into metal machine tool parts.
将铁矿转化为机床金属零件就是一个很好的实例。
youdao
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Our machine running rate use frequency conversion timing.
全机机速采用变频调速。
youdao
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Our machine running rate use frequency conversion timing.
全机机速采用变频调速。
youdao