Lub tshuab haum rau tag nrho-tawg lossis ib nrab kev ua haujlwm ntawm ntau cov khoom siv tsis khoom los ntawm cov tawv nqaij tuag cutter. Piv txwv li: Cov ntaub qhwv cov ntxaib, cov ntaub paj rwb ntim, roj hmab, luam ntawv thiab lwm yam lag luam.
Haum rau ib qho lossis ntau txheej ntawm tawv, roj hmab, yas, ntaub, txiav cov khoom siv tsis yog, tshwj xeeb yog haum rau cov khoom siv dav dav, cov ntaub ntawv yob; Tshwj xeeb cov kev cai ntawm kev txiav, me me tuag cutter, loj ntau ntawm cov khoom tshwj xeeb siv xws li football, ntaus pob, ntaus pob tesniv, kev txiav nyiaj.