基因密码决定了它们的排列是稍向顺时针方向还是向逆时针方向扭曲。
The genetic code decides whether they sit with a slight twist towards clockwise or anticlockwise.
从主轴外伸端向泵看，为顺时针旋转。
从主轴外伸端向泵看，为顺时针旋转。
To pump from the main shaft overhang end to see, for clockwise.
从主轴外伸端向泵年，为顺时针旋转。
To pump from the main shaft overhang end years for clockwise.
从主轴外伸端向泵年，为顺时针旋转。
To pump from the main shaft overhang end years for clockwise.
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