The ceramic pushing plate has high reliability, long service life, and energy-saving effect because of the low surface friction coefficient and small rotationalresistance.
陶瓷推力盘具有可靠性高使用寿命命长的特点，由于其表面摩擦系数低，转动阻力小，因而还具有节能效果。
2
Traditionally, artificial knee-joints use hydraulic damping, which presents more angular resistance to fast rotational motion than to slow motion.
传统上，人工膝关节使用液压的阻尼，其特性是会对较快的旋转施予较大的阻力。
3
NDJ-1 Rotational Viscometer is a novel instrument to be used in measuring the viscous resistance the absolute viscosity of fluid.