【机械工程；照】热量交换机（热量交换设备）；通过扭动

distortion

barrel distortion correction, keystone correction

device for measuring nonlinear distortion factor

crossover distortion

deflection distortion correction (pattern distortion correction)

distortion-free【电子】;distortionless【电子】;orthoscopic【物】

equaliser (distortion corrector)

barrel distortion