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。
However, vacuum column operations present an arduous environment for efficient fractionation, which makes upgrading product from bottoms to distillate more difficult.
然而，有效馏分的提取会使减压操作处境变得困难，也使塔底物料中蒸馏出更多的产品变得更加困难。
I sketched in part of the vacuum that's forming in the traditional banking business in my Oct. 27 column, "Why big Banks hate banking."
我10月27日的专栏文章《大银行为什么恨银行业》里，我略约地填补了传统金融业造成的部分真空。
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