用“kinetic friction”造句大全,kinetic friction造句
testing method for kinetic friction of yarn:yarn against steel
For sliding contact, the coefficient of kinetic friction Uk is defined as the ratio of the frictional force to the normal force.
testing method for kinetic friction of yarn:yarn against steel
For sliding contact, the coefficient of kinetic friction Uk is defined as the ratio of the frictional force to the normal force.