Top and Bottom Side Sheffield Roughness "Rougher Grades" with Porosity - Porosity Ranges: Sheffield(0.1 - 420), Eq. Oil Gurley(2.0 - 21323), HP Gurley sec/2.5ml Low Range(0.1-548), HP Gurley sec/2.5ml High Range(0.2-1909), HP Gurley sec/10 ml Low Range(0.2-2223), HP Gurley sec/10 ml High Range(0.7-7747), Bendtsen 5sq cm(0.4-3000), Bendtsen 10sq cm(0.2-2224).
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