Insulating txheej yog txheej nrog cov khoom siv hluav taws xob zoo heev. Nws muaj cov khoom siv hluav taws xob zoo, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob thiab cov khoom siv tshuaj lom neeg, feem ntau yog cov kua roj vanish, tab sis kuj muaj xim xim.
