It can hold your mobile vertically or horizontally and the Angle can be easily changed by attaching the tail on a different spot on the back side.
它可以让你的电子设备或横躺或直立，只需改变在设备背面贴上尾巴的位置，设备放置的角度便可以任意调整。
Your arms should be at a 90 degree Angle and should be moving forward and back (rotating at the shoulder), not side to side.
您应该肘部弯转90度，双臂前后摆动(旋转，以肩部为中心)，而不是左右摆动。
Measurable parameters include the coordinates of the circle center of the cutter teeth compact and the compact's back rake Angle and side sway Angle.
可测量的位置参数有切削齿复合片的圆心坐标及负前角、侧偏角等。
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