Dab tsi yog qhov zoo ntawm cov qhov rooj folding
1. Lub qhov rooj folding tuaj yeem qhib kom tiav. Lub qhov rooj folding tuaj yeem muab tso rau qhov rooj tag nrho, thiab cov chaw qhib tau nyob 100% ntawm lub qhov rooj qhib.
2. Zoo nkauj thiab zam. Tam sim no ntau cov qhov rooj folding yog tsim los ntawm cov ntaub ntawv tshiab, uas zoo nkauj dua thiab zam.
Dab tsi yog qhov tsis zoo ntawm cov rooj folding
1. Tus nqi yog kim me ntsis. Cov txheej txheem ntawm cov qhov rooj folding yog qhov nyuaj me ntsis, yog li nws yog tus nqi nkaus.
2. Kev tu thiab huv huv yog teeb meem. Cov qhov rooj folding thiab cov nplais zawv zawg yog qhov tsis yooj yim los ntxuav cov hlua swb, thaum lub qhov rooj folding ntau dua cov khaubncaws sab nraud povtseg, thaum hais lus yooj yim dua, nws yog qhov nyuaj dua los ntxuav.
3. Tom qab lub sijhawm ntev, cov quav yog yooj yim tawg. Tom qab lub sijhawm ntev ntawm kev siv, hloov pauv ntawm cov khoom siv kho vajtse hauv nruab nrab quav ua phem dua.
