- low grade ore
- low-grade ore
- 低级: elementary; rudimentary; pri ...
- 矿: ore deposit
- 低品位矿石；低级矿石: low-grade ore
- 低级: 1.(初步) elementary; rudimentary; primary; lower 低级阶段 lower stage; 低级生物 low forms of life2.(庸俗) vulgar 低级趣味 vulgar interests; bad taste3.(低等级的) low grade; [计算机] low level
- 超级矿砂船: super ore carrier
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