Txiav: Txiav cov ntaub ntawv hlau raws li qhov tsim qhov ntev.
Vuam: Vuam cov khoom txiav mus rau hauv ib qho ua tiav.
Kev kho deg: Siv cov kev kho mob xws li hmoov txheej, galvanizing, lossis polishing rau cov railings los txhim kho lawv qhov zoo nkauj thiab ua haujlwm ntev.
Kev txhim kho: Txhim kho cov railings tiav nyob rau hauv qhov chaw xaiv, kom muaj kev ruaj ntseg.