stretcher levelling, stretcher flattening
lehtmetalli (plekk, riba) õgvendus, venitades metalli voolepiiri ületavatel pingetel (vt õgvendus; vrd rullõgvendus), the leveling of a piece of sheet metal (that is, removing of warp or distortion) by gripping it from both ends and subjecting it stress higher than its yield strength (see: leveling; compare: roller leveling)
