At last, the productivity predicting model of the high-pressurepacking sand-control well with the transitional zone is established based on the fluid mechanics in porous medium.
最后，根据渗流力学原理建立了更加完善的高压充填防砂井产能预测模型。
2
The designer may lower the pressure on the packing by placing a throat bushing in the pump case (Figure).
设计者可在泵壳内放置喉道补心以降低在填料上的压力(图)。
3
The molder must recognize the dangers of excessive fill speed, insufficient injection pressure, excessive melt temperature, and inadequate packing.