Iav txheej:
PL: rau cov pleev xim, cov xim khib nyiab, cov tais diav, cov nplaim, siv lead ua, xav tau kev kho tshwj xeeb, muaj ob qho tib si pob tshab thiab dawb, tuaj yeem ua tau lub teeb thiab nyhuv. Yuav tsum tau nws yuav ua taus rau ua noj, nws feem ntau yog nrog cov roj dawb, adhesion tseem ceeb heev, dawb roj yuav tsum tsis dhau muaj zog, los yog yooj yim los dissolve tus qauv, Nws yog qhov zoo tshaj rau tshuaj tsuag ob zaug.
