Meanwhile the product quality controls on the nutrient, moisture and appearance of particle are discussed from the past 4 year DAP quality data.
针对装置运行4年来的DAP 产品质量变化情况，就产品的养分、水分、 颗粒外观等方面，提出了比较有效的生产控制方法。
The results showed that for this experimental system the particle-fluid mass transfer almost controls the overall rate, the approximate solutions fit the exact solution.
结果表明：本实验系统中传质过程接近于外扩散控制，近似解与精确解吻合较好；
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