Lub rooj zaum sab nraum zoov nyob sab nraum zoov vim tias nws ib puag ncig, thiab cov kev xaiv cov khoom yog nqaim. Feem ntau, nws yog ua los ntawm cov ntaub ntawv xws li granite, cov rooj zaum, yog li cov dej sib tsoo, yog li sab nraum zoov cov rooj zaum hauv chaw ua si yuav tsum tau ceev thiab kho kom rov zoo.
(1) Muaj nuj nqi ib qho haujlwm ib qho, feem ntau yog tso rau hauv cov tiaj ua si, cov zej zog, cov chaw thiab lwm qhov chaw sab nraum zoov. Siv los ntawm ntau tus neeg, siv rau sab nraum zoov bleak, so, thiab lwm yam;
(2) Kev ua kom pom kev pom pom muaj kev pom zoo yog kev sib koom tes nrog kev thaj chaw sab nraud. Feem ntau ntawm lawv siv cov ntaub ntawv ntuj xws li ntoo thiab ntaub pua chaw, uas muaj tswv yim hauv style, zoo nkauj thiab muaj kuab heev, thiab tsis yooj yim rau kev nplua nuj.
(3) Kev tiv thaiv kev tua hluav taws, anti - tub sab, anti- corrosion, tuaj yeem ntsib tus so ntawm ntau tus neeg tsis muaj kev ntxhov siab;
(4) Cov ntaub ntawv tsis siv cov tshuaj lom lossis cov khoom lag luam txaus ntshai thiab yog yooj yim ntxuav. Vim yog qhov tshwj xeeb ntawm kev siv sab nraum zoov, cov dav dav siv yas ntoo, thiab marble lossis granite xav tau kev ntxhib los mos kom tiv thaiv tib neeg puas tsuaj. Yog li ntawd, tus qauv steel yuav tsum tau kho nrog anti - corrosion kev kho, nag los- ua kev puas tsuaj.
