求翻译：试验前应增加预摆动（±摆动）和预旋转（正方向旋转圈数完成后再反方向旋转圈数）功能，±摆动的角度和速度可以设置；正反方向的旋转圈数和速度可以设置，预摆动和预旋转功能能够独立进行设置。是什么意思？

Before the test should increase the pre-swing (± swing) and pre-rotation (positive direction of the number of rotations after the completion of the anti-rotation turns), ± swing angle and speed can be set; positive and negative direction of rotation of the number of turns and speed can be set , pre-

Tests should be added before the Swing Swing ( ± ), and pre-rotate (rotation direction is being done, and then turn the opposite direction), rotate number of turns, ±swing angle and speed can be set up; both positive and negative direction of the turn and speed can be set up, the pre-swing and pre-r

Before after the experiment should increase pre-swinging (± swinging) and pre-revolving (direction revolving turn completes again reversed direction revolving turn) the function, ± the swinging angle and the speed may establish; The pro and con direction revolving turn and the speed may establish, p

Pre-swing should be added before the test (± Swing) and rotation (positive direction ring rotating in the opposite direction after several completed laps), ± swinging angle and the speed can be set; the positive and negative direction ring the number and speed of rotation can be set, swing and rotat

正在翻译，请等待...