Because of the quick change and unexpected stop of the circulating direction of oil liquid, the machine tool hydraulic system will produce pressure impact.

机床液压系统由于油液流动方向迅速改变或突然停止流动，产生压力冲击。

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The pressure impact will produce influence on the steadiness of hydraulic system, and lead to the damage of seal apparatus, piping, and components in the system;

压力冲击会影响液压机构工作稳定性，引起系统中的密封装置、 管路、元件的损坏；

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But in the same time, in order to decrease even refrain the pressure impact and gas eroding during the process of matching flow, there are groves or holes in the valve plate.

而同时为了抑制乃至消除在配流过程中出现的压力冲击、气蚀，配流盘上往往设有减振槽或减振孔。

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President Obama faces domestic political pressure of his own in dealing with the Chinese currency issue and its impact on trade.

VOA: standard.2010.03.23

Pressure from the president's liberal Democratic base is likely to have an impact on that decision, says former assistant secretary of state Teresita Schaffer.

VOA: standard.2010.07.30

If that becomes under severe pressure, the impact on the whole economy in the U.S. will be devastating.

NPR: With Hat In Hand, Detroit's Big 3 Go To Capitol Hill

But pressure has an impact that reaches well beyond the scientific realm.

FORBES: 6 Ways To Conquer Leadership Pressure

If there is to be political strife in Indonesia though, the market will be under pressure and the impact on Asia will be negative.

CNN: ASIANOW - Asiaweek