This article takes the vacuum column equipment for an example to do the external pressed vessel machinery design by using of computer programs.

本文以真空操作塔为例，辅助计算机程序以完成外压容器的机械设计。

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Mr Walker said he and his daughter got to stop the traffic and shut the gates of the bridge before they pressed the button to raise the bascules and waved the vessel through.

BBC: Cabbie inventor of bridge game raises Tower Bridge