As shown in the figure, the gear is left or right, the affirmative answer (high reward)
With the right hand, the palm of the hand outward, the thumb parallel to the axis, four fingers and the tilt of the gear is the same direction, that is, the right hand, and the other is left-handed
According to the direction you show to determine the axis, that is, the vertical axis, at this point to see the spiral, which side is high, which side spin, that is, your right high, while the right hand
This is a right-hand gear. The simplest and convenient way to distinguish between left and right is to use the thumb rule.
Stand in the radial position of the gear, observe the lowest end of the tooth, the left side is left, and the lower right is the right hand. Oh, (~ o ~ ~zZ)
