A set of points inside Vapour Liquid Envelope with the same Vapour same Vapour Quality (see Fig. 1).
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| Fig. 1. Example of Vapour Liquid Envelope with Vapour Quality Line |
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[ State of matter ][ Pure substance ] [ Mixtures ][ Fluid Mixtures ][ Phase ][ Vapour Quality ]
[ Dew Point Curve ][ Bubble Point Curve ]
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