力偶: [力学] couple; couple of forces; force couple◇力偶臂 arm of couple; 力偶矩 moment of couple; 力偶三要素 three elements of a couple; 力偶系 system of couples; 力偶轴线 axis of couple; axis of the couple
力偶平衡: balance fo couplesbalance of couplesequilibrium of couples