River xuab zeb ziab ntau lawm kab
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Qhuav ntau lawm kab nrog tsawg zog noj thiab siab tso zis ntau lawm
Nta thiab qhov zoo:
1. Tag nrho cov kab ntau lawm txais kev tswj hwm kev sib koom ua ke thiab kev ua haujlwm pom kev cuam tshuam.
2. Kho cov khoom noj ceev thiab lub tshuab ziab khaub ncaws tig ceev los ntawm kev hloov pauv zaus.
3. Burner ntse tswj, ntse tswj qhov kub thiab txias muaj nuj nqi.
4. Qhov kub ntawm cov khoom qhuav yog 60-70 degrees, thiab nws tuaj yeem siv ncaj qha yam tsis muaj cua txias.
