ASME txheem cam khwb cia steel rooj vag valve feem ntau nyuaj foob rooj vag valve, cov khoom siv tau WCB, CF8, CF8M, kub, siab siab thiab corrosion kuj, peb cam khwb cia steel rooj vag valve nyob rau hauv txoj kab nrog domestic thiab txawv teb chaws qauv, txhim khu kev qha sealing, zoo heev kev ua tau zoo. , hloov pauv hloov tau yooj yim, ua kom tau raws li qhov xav tau ntawm ntau yam haujlwm thiab cov neeg siv khoom xav tau.