The overall characteristics of flow field are analyzed and various influences of nozzle diameter on the downhole flow field of PDC bits are obtained.
分析了流场的总体特点，得出了喷嘴孔径对PDC钻头井底流场的各种影响。
Can be seen on the axial piston pump with dynamic characteristics of flow field during distribution process of an in-depth and detailed analysis has important significance.
可见，对轴向柱塞泵配流特性进行深入细致的分析研究有着重要的意义。
Mathematical model of tracing exploration is established after generalizing the law of movement of tracer in seepage flow field of rockfill dam to master the characteristics of flow field.
本文通过对堆石坝渗漏流场中示踪剂运移规律进行概化，建立示踪探测数学模型，达到了认识其流场特征的目的。
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