... crushed rock aggregate 碎石集料 graded crushed rock 级配碎石 Crushed rock pile 碎石桩 ...
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lime-fly ash graded crushed rock 二灰级配碎石
cement graded crushed rock 水泥稳定碎石
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According to the research, the natural graded gravel is the best backfill material of graded crushed stone, grit, lime stabilized soil and rock chips.
研究表明，在连续级配碎石、砂砾、石灰稳定土、石屑几种回填材料中以自然级配砂砾石为最佳台背回填材料。
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