Viav Vias Kos Valve

Peb nyob nraum zoo-lub npe hu ua ib qho ntawm kev viav vias kos duab rau cov chaw tsim khoom thiab cov chaw muag khoom hauv Suav teb. Thov koj xav yuav zoo viav vias kos duab valve ua nyob rau hauv Suav teb no los ntawm peb lub hoobkas. Tiv tauj peb kom paub meej ntxiv.