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manufactured sand
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manufactured sand
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manufactured sand
机制砂
经除土处理,由机械破碎、筛分制成的,公称粒径小于5毫米的岩石、矿山尾矿或工业废渣颗粒。不包括软质、风化的颗粒。
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diversion gaps along the Jingjiang section in the middle reaches of the Yangtze River
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更新时间:2026/10/10 13:45:50