其次是应用气流密度分选系统对粗堆肥进行精分选。
Secondly, coarse composts should be separated by airflow density separation system.
文中用莫尔条纹法测出了射流冲击场的气流密度分布。
The flow density distributions of jet flow shock field have been measured using Moire schlieren method in this paper.
因为冷气流密度较高(更大的质量单位体积内)，冷空气引入采一般的工作从外面冷空气热引擎湾。
Because cooler air has a higher density (greater mass per unit volume), cold air intakes generally work by introducing cooler air from outside the hot engine bay.
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