4 . coeffcient of static friction is the same to coefficient of dynamic friction , can dispel low speed creeping , ensured the working precision 4静动磨擦系数相近,能消除低速度的爬行,从而保证机械的工作精度。
Paper and board . paper , board , corrugated board and their components . determination of the coefficient of static friction and ' estimation of the coefficient of dynamic friction dynamometer method 纸和纸板.纸张纸板和瓦楞纸板及其组成部分.静摩擦系数测定和动摩擦系数估算测力计法