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NSEN tsom mus rau npauj npaim valve txij li xyoo 1983, Peb cov khoom tseem ceeb xws li:

Lub hau nrog ob npaug / peb npaug eccentricity

Damper rau cov huab cua kub heev

Seawater Desalination Npauj Npaim Valve

Cov yam ntxwv ntawm peb lub qauv eccentric

Khoom MetalSealkev ua

Kev Sealing Ob-directional

Hiav Txwv Hloov Taukhub ling

Ob Chav Kev Nyab Xeeb Qauv

Tsim Kev Nyab Xeeb Hluav Taws

Tsis Muaj Thaj Chaw Tuag

Kev Pabcuam Ntev

xoom xaukev ua haujlwm sealing

Kub siab, Siab siab, tiv taus corrosion

Kho kom haum rau kev ua haujlwm tshwj xeeb