Hollow Hlau Cased Qhib Ncej

Hollow hlau cased qhib ncej yog tsim tsa tsis muaj kev sib tw nres. Cov thav ntawv no tuaj yeem yog dawb paug thiab siv los txiav ib lub ntsa qhib lossis lawv tuaj yeem npaj rau cov rooj qhib sab nraud, xws li kev cuam tshuam cov cuab yeej lossis ob chav ua yeeb yam.