Note: Look at the models left arm (camera right) in both examples above. On the left, her arm is aligned with the eyes and creates a diagonal that leads down and away from the face.

注意：看两张图中的模特的左手（相机的右边），在左边，她的手臂与眼睛对其，创造了一个斜线，让手臂远离脸部。

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The fluted disc on the connecting sleeve is contacted and glide with the diagonal face to form zero return stroke. The speed of tweaking screws is high.

斜面与联接套的齿盘接触可滑动，形成空回程，扭螺丝速度快。

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