Cov hmuv cawv yog lub npias thoob qhov hluav taws xob valve, siv rau lub thoob npias, ua ke nrog lub thoob caj dab xov foob, thiab nrog tib hom filling kab thiab dispenser,
Cov neeg ua haujlwm muaj kev txawj ntse, muaj peev xwm ua tau zoo, cov txheej txheem yog qhov tshwj xeeb, cov khoom ua tau raws li qhov xav tau thiab kev xa khoom yog lav, tus khub zoo tshaj plaws!