Cov lus qhia sov:
Cia kom deb ntawm hluav taws thiab nplaim taws.
Txhawm rau ntxuav, ntxuav tes nrog dej sov thiab ib daim ntaub mos muag. Tom qab ntxuav, dai los yog sawv ntsug thiab qhuav nyob rau hauv ib qho chaw zoo-ventilated.
Tom qab siv cov khoom noj oily, ntxuav nrog me me ntawm xab npum thiab dej sov.
Txhawm rau tshem tawm cov ntxhiab tsw tsw thiab lwm yam ntxhiab tsw tom qab siv, sim ntxuav nrog txiv qaub thiab ntsev.
Riam rau tus phooj ywg, cov ntaub ntawv cov khoom ntom ntom ntom ntom ntom ntom ntom ntom ntawm cov hlau riam, cov khawb me me thiab tsis tuaj yeem zam.










