Qhia me me : peb kuj muab cov khoom siv ntsia hlau thiab cov thoob zoo li: Lub Taub Hau, Sab Nruab Nrab thiab Nozzle Ntsia thawv hau thiab lub pob valve Ntau cov ntaub ntawv tshwj xeeb nrog cov haujlwm tshwj xeeb