圧力と常圧下で粉煤の体積は変化するでしょうか？変化はどれほど大きいでしょうか？
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圧力と常圧下で粉煤の体積は変化するでしょうか？変化はどれほど大きいでしょうか？
物理的に積載密度という概念があり、物質が圧迫されること一般に密度が大きくなり、体積が減少します
固体物料应该不会有太大的变化
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