stretch forming, inflection, inflexion
sự uốn vuốt
distortion of the track, inflexion, warping
sự cong vênh đường ray
bending in two planes, bend-over, bowing, crock, crooking, curve, curving, deflection, flexion, incuration, inflexion, sinuosity
sự uốn cong trong hai mặt phẳng