By the method of sawing and saw blade swing taking the line of saw-teeth of saw blade's working side for centre, saw blade always works toward the tangent of sawing curve.
Where you cannot see far ahead on the road because of a curve or a hill, move right to avoid colliding with an oncoming vehicle that is over the centre line.
如前方有转弯或小山阻碍你的视线，靠右行驶避免与前方越过中心线驶来的车辆发生碰撞。
3
Methods: By recording the action potential of sciatic trunk and contract curveof sural muscle of hoptoad, and measuring the time of fatigue in nerve centre, neuro-muscular junction and muscle.