阐述了铝块状光谱标样的成分设计、标样熔炼工艺理论及铝标样铸锭缺陷的控制。
The composition design, melting process theory and defect control on cast ingot of Aluminium standard sample were described in this paper.
全国铁矿石和粗铜的物质投入在整体上有较明显的下降趋势，但原铝的这一指标则无规律可循。
While the overall material input of iron ore and crude copper displayed a decreasing trend, that of crude aluminum presented ruleless over the study period.
全国铁矿石和粗铜的物质投入在整体上有较明显的下降趋势，但原铝的这一指标则无规律可循。
While the overall material input of iron ore and crude copper displayed a decreasing trend, that of crude aluminum presented ruleless over the study period.
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