力偶矩

M moment of couple in the following sequence: intact, instability, Germany AESCULAP SSE hanger fixation and neotype shape memory alloy cervical hook fixation.

将标本固定于脊柱三维运动试验机上，施加2.0 N？m的纯力偶矩。测量标本的前屈、后伸、左侧弯、右侧弯以及左、右旋转等6个运动方向的运动幅度。

Methods Ten fresh-frozen foot specimens, three-dimensional kinematics of talonavicular joint were determined in the case of neutral position, dorsiflexion, plantoflexion, adduction, abduction, inversion and eversion motion by means of three-dimensional coordinate instrument （Immersion MicroScribe G2X） before and after calcaneocuboid arthrodesis under non-weight with moment of couple, bending moment, equilibrium dynamic loading.

方法10只新鲜尸体足标本，通过建立非负重位尸体足模型，结合力偶矩、弯矩及平衡加载方法，应用三维坐标仪测量分析跟骰关节融合前、后距舟关节在大体足背屈、跖屈、内收、外展、内翻及外翻运动中的三维运动度变化。

The ratio between the net moment and net force on a tooth with reference to the center of resistance determines the center of rotation.

力偶矩与力的比值和阻抗中心的关系决定了牙齿的旋转中心。

Determine (1)the angle acceleration of the tub wheel,(2) the tensile force of the rope,(3) the reaction forces at point O on the bearing,(4)the friction force between the cylinder and the inclined plane (neglecting the rolling friction).

在图示机构中，沿斜面向上作纯滚动的圆柱体和鼓轮O均为均质物体，各重为P和Q，半径均为R，绳子不可伸长，其质量不计，斜面倾角，如在鼓轮上作用一常力偶矩M。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。