Cov khau hauv qab ua kuafeem ntau yog puv nrog glycerin, yog li thaum tib neeg taug kev, cov kua yuav ncig ntawm lub pob taws thiab lub hauv paus ntawm ko taw, yog li tsim cov nyhuv sib txhuam thiab tso tawm qhov siab ntawm ko taw.
Lubcov kua hauv qabmuaj peev xwm muab tso rau hauv txhua hom khau. Nws tuaj yeem txo qhov qaug zog lossis mob los ntawm kev sawv lossis taug kev ntev.
Cov khau hauv qab ua kuasiv tau ntau zaus, tsuas yog ntxuav lawv hauv dej txias thiab ziab lawv raws li ntuj tsim, cia lawv huv dua rau hnub tom qab.
Lub sijhawm tshaj tawm: Lub Kaum Hli-21-2022
