This article introduces the general design method of atmospheric vessel's vacuum relief.

介绍了常压容器真空泄放设计的一般方法。

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This design can be used in the pilot operated pressure relief mode and also provide pilot operated vacuum relief.

这种设计可用于先导操作泄压方式，也能提供先导式真空救济。

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Inlet pressure losses developed during relief conditions must be taken into account when sizing the pressure and vacuum relief devices.

在对压力和真空泄放装置选型时，在泄放情况下的进口压力损失的变动必须要进行计算。

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If they succeed, they may bring some relief to media firms that have seen much of their business disappear into the vacuum: many in the music and newspaper businesses, for example, are pinning their hopes on the idea that consumers can be persuaded to pay small amounts for digital wares.

ECONOMIST: Video games move online