Nyob rau hauv cov txheej txheem ntawm lub valve ntau lawm, yog tias cov khoom siv thiab cov khoom siv tsis raug tswj kom zoo, nws tseem yuav ua rau qhov tsis ua haujlwm ntawm lub foob, uas yuav ua rau muaj teeb meem xws li nruab nrab to. Hauv cov txheej txheem no, cov kws tshaj lij tuaj yeem ua kom zoo dua qhov nruab nrab thiab xaiv qhov tsim nyog valve raws li kev khiav hauj lwm kub thiab siab, uas tuaj yeem txo qhov tshwm sim ntawm cov teeb meem cuam tshuam rau qee yam.Nyob rau hauv cov txheej txheem no, cov neeg ua haujlwm kuj yuav tsum tau ua haujlwm tsis tu ncua. , thiab siv cov kev ntsuas zoo rau cov teeb meem tshwj xeeb txhawm rau txhim kho cov khoom zoo. Nws yog ib qho tsim nyog los xyuas kom meej tias qhov chaw xaiv valve ua tau raws li qhov tsim nyog yuav tsum tau ua, txhawm rau ntxiv dag zog rau kev txiav tawm siab. Tsim nyog daim ntawv thov ntawm li qub, kos li qub, lub rooj vag tsis tshua muaj siab thiab lwm yam li qub hauv cov txheej txheem ua haujlwm tshwj xeeb kom tsis txhob muaj teeb meem zoo thiab muab kev lees paub rau kev siv cov li qub.
