worm iav wafer npauj npaim valve, feem ntau yog siv hauv qhov loj dua DN250, Lub thawv iav iav tuaj yeem ua rau lub zog nce ntxiv, tab sis nws yuav ua rau qeeb qeeb. Kab laug sab iav npauj npaim valve tuaj yeem ua tus kheej xauv thiab yuav tsis rov qab tsav. Rau lub rooj zaum Soft worm iav wafer npauj npaim valve, qhov zoo ntawm cov khoom no yog lub rooj zaum tuaj yeem hloov tau, uas yog nyiam los ntawm cov neeg siv khoom. thiab piv rau lub rooj zaum rov qab nyuaj, nws txoj kev sib khi zoo dua.