... 良好级配土 well-graded soil 不良级配土 poorly-graded soil 不连续级配土 gap-graded soil ...
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级配不良土 graded soil
不良级配土
Poorly graded soil
以上为机器翻译结果，长、整句建议使用 人工翻译 。
并通过试验得出，含一定量细粒组分且级配良好的粗粒土渗透破坏坡降比级配不良的粗粒土渗透破坏坡降普遍要高的结论。
And it comes to a conclusion that the permeation damage slope of the coarse-grained soil of well graded with a definite proportion of fine granule is higher than that of poorly graded.
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