Cov yam ntxwv ntawm kev siv qhia meej txog qhov tseem ceeb ntawm kev ua tau zoo thiab qhov kev siv ntawm lub valve.
Daim ntawv thov yam ntxwv ntawm lub valve muaj xws li: hom valve (cable digital TV valve, hloov valve, kev nyab xeeb valve, thiab lwm yam); yam khoom (nres valve, ntiaj teb valve, npauj npaim valve, Valves, thiab lwm yam); raw khoom rau qhov tseem ceeb valve (roj Circuit Court board, kos valve, valve lub rooj, piston valve, tsa nto); valve kis system txoj kev, thiab lwm yam.
