sand-grain volume

Development of the portable exhale volume meter 4, the sand in water.

呼气流量峰值计的研制4、水流含沙量。

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From the ground to the surface of the sand bed, the average volume fraction of sand particles in the sand bed gradually decreases.

从地表至沙床表面，同一平面的沙床平均堆积率逐渐减小。

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A unit of volume ( as for sand or gravel).

用于测量沙石的体积单位。

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The intraformational heterogeneity controls and affects the swept volume of the injectant in single sand layer, directly determines the waterflood efficiency, and is the key factor influencing the distribution of the remaining oil.

层内非均质性控制和影响单砂层内注入剂波及体积，直接决定水驱效率，是影响层内剩余油分布的关键因素；

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To the dense sand, the reversibility of part of dilatation is the main reason of the volume contraction.

密砂的卸载体缩是剪胀可恢复的宏观体现。

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