Khub ntawm hollow hlau qhov rooj

Lub qhov rooj nquag ntawm khub yog feem ntau prepped rau lub xauv ntaus ntawv, xws li lockset lossis tawm ntaus ntawv. Lub qhov rooj qub (lossis lub qhov rooj tas sij hawm Tawm cov khoom siv lossis laub / rub kho vajtse yuav tsum ua kom ob lub qhov rooj nquag.