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Unique ultra pure copper mirror, low reflection, heat loss is small.
特有超纯铜镜面，低反射，热损小。
youdao
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The copper, aluminum, etc for soft metal, wear small;
工件为铜、铝等软金属时，磨损较小；
youdao
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The copper, aluminum, etc for soft metal, wear small;
工件为铜、铝等软金属时，磨损较小；
youdao