Kos valve yog lub valve uas tso siab rau qhov nruab nrab ntawm nws tus kheej kom ntws thiab cia li qhib thiab kaw lub valve nrov plig plawg, siv los tiv thaiv qhov rov qab ntawm qhov nruab nrab, tseem hu ua check valve, kos valve, backflow valve, thiab rov qab siab valve. Kos valve belongs rau hom tsis siv neeg valve, nws lub luag haujlwm tseem ceeb yog los tiv thaiv qhov rov qab ntawm qhov nruab nrab, tiv thaiv lub twj tso kua mis thiab tsav lub cev muaj zog rov qab, nrog rau kev tso tawm ntawm lub thawv nruab nrab.
Kos valve yog lub valve uas tso siab rau qhov nruab nrab ntawm nws tus kheej kom ntws thiab cia li qhib thiab kaw lub valve nrov plig plawg, siv los tiv thaiv qhov rov qab ntawm qhov nruab nrab, tseem hu ua check valve, kos valve, backflow valve, thiab rov qab siab valve. Kos valve belongs rau hom tsis siv neeg valve, nws lub luag haujlwm tseem ceeb yog los tiv thaiv qhov rov qab ntawm qhov nruab nrab, tiv thaiv lub twj tso kua mis thiab tsav lub cev muaj zog rov qab, nrog rau kev tso tawm ntawm lub thawv nruab nrab.
