left handed curve是什么意思

网络释义

1)left handed curve,左旋曲线2)left-hand crankshaft,左旋曲轴3)Hook,左旋球、左曲球4)left-hand crankshaft,左旋式曲轴5)left hand helix,左向螺旋线6)Hook spinning,左曲线击球