A small hole orifice or restrictor in a component for allowing pressure in the component to be the same as ambient pressure.

部件内，用以使部件内的压力与周围环境压力相同的小孔、或限流器。

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Yet pressure from food companies has led to a "minimal" blacklist, allowing the continued sale of cakes and refrescos, says Dr Villa Romero.

然而薇拉•罗梅洛博士(Dr Villa Romero)说，来自食品公司的压力导致禁止的食品特别少，甚至还允许继续兜售蛋糕和refrescos。

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Geithner himself is under pressure for allowing large financial bonuses at American International Group insurance that is now under government control.

VOA: standard.2009.03.24

The South African lost control when under no significant pressure, allowing Gregor to pounce from close quarters.

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But once spin was introduced in the 10th over the pressure was released, allowing South Africa to score a little more freely.

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When water velocity is high, the pressure within the liquid drops to below the vapour pressure of water, allowing tiny air bubbles to expand.

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