... drainage ratio 径流系数 drive ratio 传动比 dry density-moisture ratio 干密度-含水量关系(土在一定压实度下) ...
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growth ratio of drainage area 流域面积增长率
ratio of drainage to irrigation 排灌比
drainage branching ratio 水系分支比
In order to determine the influence on account of operating conditions, aeration time, DO, reflux ratio, water drainage ratio were studied by using small CAST test-bed.
为了确定运行条件的影响，采用搭建CAST小试试验台对曝气时间、DO、回流比、排水比进行了研究。
By controlling the range of the dry density, magnitude of cement and water cement ratio of mixture, the requirement of drainage property and structure strength can be fulfilled.
通过控制混合料的干密度、水泥用量和水灰比的取值范围，可使混合料同时满足排水性能要求和结构强度要求。
Finally, with the air of freedom multiplied by the number of air compression ratio that the pressure can be drainage, to determine choose which kind of air compressor.
最终，用自由空气的数量乘以空气的压缩比即可得出排水所需的压力，以确定选择哪种空压机。
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