At last, the productivity predicting model of the high-pressure packing 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。

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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)。

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The molder must recognize the dangers of excessive fill speed, insufficient injection pressure, excessive melt temperature, and inadequate packing.

注塑工必须认识过快填充速度、不足注塑压力、过高融化温度和不充分挤压的危害性。

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He said he learned to be cool under pressure while a teenager, when he was a production-line supervisor at a tomato-packing factory.

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