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- This paper analyzes and simulates the effect of the air change rate per hour (ACH) on contamination diffusion airflow field in turbulent clean-room of hole-board ventilation by using CFD. 摘要针对孔板送风的乱流洁净室，运用CFD软件对不同换气次数条件下的气流组织和污染物扩散进行数值模拟分析。
- change rate per hour 换气次数
- According to the simulation,it is the best condition of CRE in clean room when air change rate is 55 per hour,and the conclusion provides a theoretic basis for engineering design. 通过模拟对比,得出在换气次数为55次时,房间的排污效率最好;并为工程设计提供了一定的理论依据。
- The going rate for the job is $10 per hour. 这项工作的现行工资是每小时十美元。
- The going rate for the job is￡4 per hour. 这种工作的现行工资是每小时四英镑。
- Can your car make a hundred miles per hour? 你的汽车一小时能开一百英里吗?
- The car is spinning along120 li per hour. 这车正以每小时120里的速度行进。
- The hurricane has a speed of 73 miles per hour. 飓风每小时73英里。
- The speed limit is 40 miles per hour. 规定的最高时速为40英里。
- The cruiser's speed is 50 miles per hour. 巡洋舰的速度每小时有50海里。
- Work paid for at a rate per unit of time,as by the hour. 计时工作以时间单位数，如小时数付工资的工作
- The truck was traveling under fifty miles per hour. 那辆卡车以每小时不到五十英里的速度行驶着。
- The go rate for the job be $10 per hour. 这项工作的现行工资是每小时十美元。
- Work paid for at a rate per unit of time, as by the hour. 计时工作以时间单位数，如小时数付工资的工作
- The going rate for the job is $8 per hour. 这种工作的现行工资是每小时八美元。
- Export have benefit from the fall in the ex change rate. 汇率的下跌是出口授意。
- Can you tell me the rate per day? 每天费用是多少?
- An average snail moves at a rate of 58cm per hour. 蜗牛平均一小时移动58公分。
- Export has benefit from the fall in the ex - change rate. 汇率的下跌是出口授意。
- Do you know the rate per night there? 你知道他们的收费吗?
