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1、J.霍林公式中力F和系数ε的确切含义; 2、园拄辊子在平面上滚动的滚阻力矩; 3、园球在平面上滚动的滚阻力矩。
1, J. Hollin formula force F and the exact meaning of the coefficient ε; 2, Zhu Zhu roller rolling in the plane rolling resistance torque; 3, the ball rolling in the plane rolling resistance torque.