NSEN Valve tau tsom mus rau kev muab lub valve npauj npaim zoo rau 38 xyoo txog xyoo 2020.

Peb cov khoom tseem ceeb yog lub valve Bi-directional hlau zaum, qhov zoo tshaj plaws ntawm peb cov qauv yog tuaj yeem ua kom muaj kev ua haujlwm sealing ntawm sab tsis nyiam zoo li sab nyiam.

Xav paub ntxiv txog cov koob no thov mus saib peb cov khoomHlau Zaum Bi-directional Npauj Npaim Valve 

Muaj ntau tshaj 30 xyoo dhau los, peb ntseeg tias NSEN tuaj yeem saib xyuas koj qhov kev thov tshwj xeeb rau npauj npaim valve