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The loss of tin in the sulphide copper concentrate was less than 4%.
同时锡在铜精矿中的损失也不到4%。
youdao
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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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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