Cov yas khib nyiab tau muab tso rau hauv lub lauj kaub ntawm lub tshuab, lub siab ceev tig cov hniav thiab cov hniav ruaj ruaj shear cov ntaub ntawv los ntawm kev sib hloov, kom cov khoom yuav sai sai txiav mus rau hauv pieces, tws los yog daim ntawv ntawm cov khoom nyob rau hauv centrifugal quab yuam kev sib hloov ntawm lub cutter.