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Distributions of dimensionless moisture contents (MR) for drying at 50 °C a: (a) t = 60 min; (b) 120 min; (c) 180 min; (d) 240 min; (e) 300 min and (f) 360 min. Rectangles are not at scale. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.).
