The problem was one of liquefaction of the sandy soil. 問(wèn)題是沙質(zhì)土壤的液化作用。
Mainly on the basis of microscopic investigation into the residual materials,the liquefaction behaviour of each maceral group is examined. 對固體殘渣進(jìn)行了顯微研究，討論了各種煤巖組分的液化性能。
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