Carbon dioxide and other attractants are released near the trap, which works a little like a sophisticated vacuum cleaner.

陷阱周围布好了二氧化碳和其它诱饵，陷阱灭蚊的时候与精密复杂的真空吸尘器吸尘有点像。

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Sample temperature curve can be displayed, a separator temperature curve, thetemperature curve of the cold trap, vacuum curve.

可显示样品温度曲线、隔板温度曲线、冷阱温度曲线、真空度曲线。

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Then the view is not large, to choose a pump, plus some oil purification measures, such as the Canadian cold trap, baffle, retaining the oil wells, but also in order to reach a dirty vacuum.

那末务求不宽大，能够取舍有油泵，加上一些防油净化措施，如加冷阱、障板、挡油阱等，也能达成肮脏真空务求。

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Just like the filter in a vacuum cleaner, however, the trap must be cleaned periodically.

FORBES: Clearing the Air