فهرس المقالات High contact ratio حرية الوصول المقاله صفحة الملخص نص كامل 1 - A Comparative Study of Tooth Wear, Mechanical Power Losses and Efficiency in Normal and High Contact Ratio Asymmetric Spur Gears R Prabhu Sekar 10.22034/jsm.2019.579286.1354