The unit pressure in backward extruding hollow billet has been calculated by the slip line method and the upper bound method.

本文对空心件反挤的单位挤压力，采用滑移线法和上限法进行了计算。

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Gas transmission rate: the volume of gas which, under steady conditions, crosses unit area of the sample in unit time under unit pressure difference and at constant temperature.

译文：气体透过率：在一定的温度下，在单位时间内单位压力差下，稳定透过单位面积试样的气体体积。

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The internationally recognized unit for measuring this pressure is the kilopascal.

国际公认的测量压力的单位是千帕。

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Eight of the more than 9, 700 tubes in one of the unit 3 generators failed a pressure test, while six tubes in unit 2's reactor needed to be plugged, the NRC has found.

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Recent indicators showing falling productivity and a rapid increase in unit labor costs suggest the pressure is building.

FORBES: Layoffs In Brazil's Near-Future As Low Growth, Tight Labor Market Persists

Running an AC unit without a low-pressure cutoff switch when it's colder than about 60 degrees might damage it, says Troy Gregory, president of Standard Heating and Air Conditioning.

WSJ: Don't Wait to Service AC Units