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Terms for subject Desert science containing classes | all forms
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roundness classes圆度级 (以 0 (未圆化的)到1(完全圆化的)的级别表示相对圆度值的沉积颗粒组，通常划分为六级：尖角状、棱角状、次棱角状、次圆状、圆状、极圆状)

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