lehtmetalli sügavtõmbedefekt - tangentsiaalsetest survepingetest põhjustatud voltide moodustumine sügavtõmmatud tooriku tõmbamata osas- äärikus; defekt on välditav spetsiaalset surverõngast kasutades (vt sügavtõmbamine), a wavy condition obtained in deep drawing of sheet metal, in the area of the metal between the edge of the flange and the draw radius; wrinkling may oalso occur in other forming operations when unbalanced compressive forces are set up (see: deep drawing)