... 尼日尔皮革Niger Morocco 泥版clay matrix 泥活字clay type ...
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detrital clay matrix 碎屑粘土基质
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The concept of effective density and water content were introduced to describe the physical state of the clay matrix filling between sand particles.
引入有效粘土密度和有效含水率的概念，描述石英砂颗粒之间的粘土基质的物理状态。
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