1. Lub ntug muaj qhov sib nqus kev ua haujlwm los tiv thaiv nws ntawm kev nqa.
2. Yooj yim, xis thiab yooj yim nqa.
3. Lub flip stand tsim tso cai rau koj saib cov yees duab yooj yim.
4. Nws tuaj yeem tiv thaiv cov khoom siv los ntawm ib txwm khawb, av, tawg thiab puas.
5. Tag nrho cov nyees khawm thiab cov chaw nres nkoj yooj yim rau kev nkag.
6. Electroplating rau sab, zoo nkauj thiab xis nyob.

Lus Cim: Cov khoom siv tiag tiag yog raws li lub npe qauv. Lub tshuab qauv hauv daim duab tsuas yog siv rau kev siv xwb.

Koj puas xav tau Samsung Galaxy S21 tshiab? Nyem qhov no