Quartz sand is a major material for making glass and an indispensable nonmetal mineral product of building material industry.
石英砂是制造玻璃的重要原料，也是建材工业不可少的重要非金属矿产。
Quartz sand is a major material for making glass and an indispensable nonmetal mineral product of building material industry.
石英砂是制造玻璃的重要原料，也是建材工业不可少的重要非金属矿产。
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