Xov xwm kev lag luam
-
NIJ Tus Qauv 0106.01
Nyeem ntxiv -
Dab tsi yog cov thev naus laus zis ntawm cov phaj tiv thaiv mos txwv?
Cov thev naus laus zis ntawm cov phaj tiv thaiv mos txwv yog dab tsi? Muaj ntau hom thev naus laus zis ntawm cov phaj tiv thaiv mos txwv, feem ntau muab faib ua ob pawg: txheej polyurea thiab daim ntaub npog. Daim ntaub npog yog ib txheej ntawm cov ntaub tsis muaj dej qhwv ib ncig ntawm qhov chaw...Nyeem ntxiv