反向转动

The center of balls in bearing is fixed by the fork of locating sleeve. The cooperation between linkage pin, grip slot of drive axle and ratchet wheel is used to make the drive axle and driven axle rotate in same or different directions for threading or turning back.

本攻丝装置由拨叉定位套上的拨叉将轴承中滚珠的中心固定，利用联动销与主动轴的卡槽和棘轮的配合，实现主动轴与从动轴的同向转动和反向转动，完成丝锥正转攻丝和自动反转退出工件工作。

Therefore,the elastic resistance is augmented , which makes electric current fluctuate excessively ,the reductor abraded and binded ,and the tyre worn out badly .Thus ,the operation has to be suspended.By means of mechanical property and finite element analysis and calculation of the tyre...

通过力学性能及轮胎有限元分析计算，认为必须改进传统设计使筒体的转动方向与传动装置反向，这样可以在非传动侧均匀设置支撑，以减少主动侧、被动侧的支反力，即减少轮胎的弹性变形阻力矩，达到保护减速机的目的

Rely on two synchronous reverse rotation of the rotor (2-4 teeth) during rotation in the entrance have a suction, to be inhaled in order to transport materials.

依靠两同步反向转动的转子（齿数为2—4）在旋转过程中于进口处产生吸力，从而吸入所要输送的物料。

The working principle of the rotor pump: rotor pumps rely on the two synchronous reverse rotation of the rotor (2-4 teeth) during rotation in the entrance have a suction, to be inhaled in order to transport materials.

转子泵的工作原理：转子泵依靠两同步反向转动的转子(齿数为2—4)在旋转过程中于进口处产生吸力，从而吸入所要输送的物料。

When the large rotating arm rotates, the transmission gear is driven to rotate around the fixed gear to rotate the planetary gear, which drives in turn the small rotating arm to rotate in the direction opposite to the large rotating arm, so that the shaft of the small rotating arm reciprocates across the rotation center of the large rotating arm.

当大旋臂旋转时，传动齿轮受到驱动沿固定齿轮周转并带动卫星齿轮转动，卫星齿轮带动小旋臂作与大旋臂反向的旋转，从而使小旋臂上的固定轴随着大、小旋臂的旋转不断往复越过大旋臂的旋心作直线运动。

When a motor rotates, a ball feed screw pair converses positive and reverse rotation into advance and recession of the cap nut, thus the rotation directions of the motor can be directly and clearly identified.

电机转动时，滚珠丝杠副将正、反向旋转运动转化为螺母的前进和后退，故可快速直观地判断电机高速运行时的转动方向。

This counter-turn for vision adjustment doesn't occur as easily for backhands because the racket arm pulls across your body when taking the racket back.

视线的反向转动调整在反手时就不那么容易了，因为在向后引拍时执拍手臂跨过身体。

The model of 3-dimensional stretching vortex ring of turbulent elliptic jet in crossflow are discovered for the first time. It is pointed out that in the evolution of turbulent jet in crossflow the 3D vortex rings, which stretching, distorting, swing in transverse direction and twisting around the stream-wise, play the leading role in the large-scale coherent structures. The counter-rotating vortex pair observed in the literature is in fact the head of the 3-dimensional vortex ring.

首次发现和提出了湍流横向椭圆射流的三维拉伸涡环模型，指出在其大尺度拟序结构中真正占主导作用的是拉伸、扭曲、沿流向扭动、展向摆动和绕x轴的转动的三维涡环，在众多实验和文献中观察到的反向涡对其实是由三维涡环头部组成。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。