mode of plastic deformation of a crystal arising when several members of a family of planes in a BCC structure simultaneously act as slip planes to produce surface planes which have fixed angles between them so that slipped surface has the appearance of a bundle of hexagonal pencils after the glide has occurred, kristalli plastse deformeerumise viis, mis tekib siis, kui mitu ruumkesendatud kuubilise struktuuri ühe tasandiperekonna tasandit toimivad üheaegselt libisemistasanditena, tekitades fikseeritud nurkadega pinnatasandid, nii et libisenud pind meenutab pärast libisemist kuusnurksete pliiatsite kimpu