The technology uses deep penetration perforation charge with high perforation density and large perforation diameter and surging perforation with greater pressure differential.

它采用高孔密大孔径深穿透射孔弹和大压差抽吸炮眼清洗技术，不仅能提高油井产能，解除近井带污染，还可以改善防砂完井效果。

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It shows that the effects of back pressure on penetration, spray cone Angle, and decline rate of centerline velocity and concentration of the spray are greater than that of fuel injection pressure.

背压对贯穿距离、喷雾锥角、喷雾轴心速度和浓度衰减率的影响均大于启喷压力。

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The pressure wave penetration and reflection properitics at a valve, which is located in a conduit, are discussed, And the Penetration and reflection coefficients are derived.

本文讨论了管道流体瞬变过程中压力波在管道中阀门处的穿透和反射情况，导出了压力波在阀门处的穿透和射反系数。

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These high-penetration levels have put enormous pressure on the electric grid and created considerable doubts about the ability to interconnect more variable resources with the grid safely.

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And Rodgers is sure his second-placed Swansea's "possession with penetration" mantra is best when the pressure comes on for a place back in the top-flight.

BBC: Rodgers insists promotion pressure suits Swansea City

The generic industry is being driven by the aging of the population, escalating health care costs, political and financial pressure to accommodate generic drug growth, and increased generic penetration, especially in Japan, Italy, Spain and France.

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