单词 | pressure balance |
释义 | pressure balancenoun 1A state of equilibrium between pressures; frequently attributive, designating a device for maintaining such equilibrium. 2 Physics an instrument consisting of a weighted piston mounted vertically in a close-fitting cylinder containing a pressurized fluid, used for producing pressures that can be accurately calculated for calibration purposes. OriginMid 19th century; earliest use found in Scientific American. |
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