The Dulong tin deposit is the largest Sn, W polymetallic deposit in Laojunshan, southeastern Yunnan and is also one of the three large tin bases in China.
都龙锡矿床是中国三大锡矿基地之一——滇东南老君山锡、钨多金属成矿区中最大的矿床。
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One problem was that magnesium (Mg) combined with tin (Sn) during billet reheat, which resulted in low strength, such as tensile strength, and poor machinability.