Cov lus qhia txog kev yuav lub tawb dev

1. Saib qhov tsos: tsis muaj qhov tsis paub meej, khawb, xim sib xws thiab lwm yam uas yuav tsum tau ua ntawm cov yas; Cov khoom siv hlau tsis muaj xeb, tsw ntxhiab,lub tawb dev.

2. Saib ntawm qhov vuam: qhov vuam yuav tsum tsim nyog kom tsis txhob muaj tsiaj txhu thiab daim npav khiav tawm.

3. Saib cov xim tsuag: cov kev cai kho qhov chaw xuab zeb blasting, qhov chaw xeb galvanized, xim ci kub siab.

4. Lub zog rub: lub zog rub yuav tsum tsim nyog thiab muaj zog.

5. Saib hauv qab ntawm lub tawb: hauv qab ntawm lub tawb yuav tsum tau tsim nrog encryption, yog li tus dev tuaj yeem nyob tau zoo thiab so nws tus kheej.