threadin foot post tau siv los tsim lub laj kab hluav taws xob hluav taws xob, xov xov hauv qab ua haujlwm tau zoo rau yuav luag txhua lub polywire, polyrope lossis polytape, tshwj xeeb kaw qhov system yuav lav tau qhov yooj yim thiab ruaj ntseg txuas. cov xov xov hauv qab ua los ntawm cov yas tiv taus tiv thaiv nrog UV inhibitor, ko taw zoo rau kev tuav hauv av, qhov sib txawv ntev (ntawm ko taw mus rau saum) muaj, thov saib hauv qab no.