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.
Lub tshuab siv los txiav tawv, roj hmab, ntaub pua plag, ntaub pua rooj, txhuam hniav, pob, pob, sab hauv cov tsheb sib xyaw ntawm tsheb, ua rau khau, Roj hmab thiab lwm yam lag luam.
Lub tshuab no feem ntau yog siv rau kev txiav ntawm cov ntaub ntawv puv lossis ib nrab txiav, cov ntawv ntim hluav taws xob hauv hluav taws xob, cov ntawv nplaum, roj hmab thiab lwm cov khoom siv hluav taws xob. Nws yog cov khoom siv me me tshwj xeeb tsim los ua cov ntawv nplaum, cov ntawv xov tooj ntawm tes, cov ntawv nplaum, duab, thiab lwm yam.