旋转摆动 meaning in English

rotary oscillation

Now move the hand to and fro and around but not up and down
然后把手前后左右以及旋转摆动，但不要上下摆动。
A balance wheel is a finely balanced disk that rotates fully one way and then the other , repeating the cycle over and over [ see illustration on page 81 ]
所谓平衡齿轮是一个精细平衡的圆盘，可以正向反向来回旋转摆动（参见早期时钟机械原理的发展? 4 ）。
In addition a chatacteristics that shows this machine is in the winding process to fork head make the top and bottom sport and or so swings , the mouth of wire can ambulation in winding fork head . . making wire of make to wrap the tidy beauty
此外，本机有一显著的功能特点，绕线时线咀能够在绕线叉头内移动，绕线时绕线叉头作上下运动和左右旋转摆动，线咀按参数设定的轨迹进行排线工作，使绕制出来的线包紧凑、整齐、美观。