海水压力是指一定高度的海水柱给予其底部1平方厘米面积上的力。常用符号P表示，单位为达因/厘米2或帕（1巴=106达因/厘米2）。
潜水员必须吸入压缩空气才不致受到周围海水压力的伤害。
Divers must breathe compressed air to keep from being crushed by the weight, or pressure, of the surrounding water.
高压泵自动欠压保护，当供水泵的海水压力低于0.05Mpa 时，设备自动停机并报警。
High pressure pump equipped with low-pressure protection device, when pre-treated sea water pressure is less than 0.05Mpa, the system will shut down automatically give alarm fattention.
在封井过程中，他们必须把用于在钻探过程里，保持钻井与海水压力相当的高密钻井泥更换掉：因为上方的海水的压力低于底下油气的压力。
As part of that process they had to replace the dense drilling mud, which was used to keep the well under pressure while it was drilled, with sea-water.
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