Cov ntsia hlau hauv avyog siv dav los khi cov vaj huam sib luag hnub ci, cov laj kab hlau thiab lwm lub tsev rau hauv av.
■ Cov ntsia hlau ua rau thaj chaw sib cuag ntau dua rau kev tsav tsheb yooj yim hauv av thiab muaj peev xwm tuav tau av.
■ Cov nplaim galvanized kub-dipped rau qhov zoo tshaj plaws corrosion thiab xeb tsis kam.
■ Muaj peev xwm dais tau zoo dua, tiv taus rub tawm thiab tiv taus kev sib txhuam sab.
■ Txuag lub sijhawm thiab yooj yim thiab ceev rau kev teeb tsa. Tsis tas khawb thiab tsis tas siv pob zeb ua.
■ Siv nyiaj tau zoo
PEB HOM TSEEM CEEB NTAWM COV NTSIAV HAUV AV:
Lub sijhawm tshaj tawm: Lub Ob Hlis-08-2021


