The lead is a common non-ferrous metal element in the gold concentrate.
铅是金精矿中常见的有色金属元素。
I am particularly good at the company's stainless steel and non-ferrous metal processing.
我公司尤其擅长不锈钢及有色金属的加工。
I am particularly good at the company's stainless steel and non-ferrous metal processing.
我公司尤其擅长不锈钢及有色金属的加工。
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