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The Gaussian distribution, Equation (8), and the histogram of the percentage of the membrane area covered with scale deposits, both normalized with the mean and variance taken from Table 3 for all tests, the width of the histogram bin is 0.5: (a) data with, 1, and without, 2, magnetic treatment; (b) data with, 1, and without, 2, the presence of 3048 cm (100 ft) coiled tubing [27].
