Rooj zaum ERGONOMIC
Cov ntaub npuag mos mos thiab xis nyob puv nrog cov ua npuas ncauj tuab, ruaj khov, uas tiv taus kev hloov pauv. Cov ua npuas ncauj yog npog nrog cov tawv PU zoo tshaj plaws, ua haujlwm hnyav thiab muaj zog rhuav tshem, uas yuav tsis ploj mus. Cov txheej tiv thaiv ntxiv tiv thaiv kev hnav thiab tsim kua muag thiab tuaj yeem hloov pauv tau yooj yim.