NSEN valve tsom mus rau npauj npaim valve rau 38 xyoo txij li xyoo 1983, peb tau koom nrog kev sau ntawv npauj npaim valve tus qauv xyoo tas los.

Nws yog ib qho koob meej loj rau peb lub tuam txhab thiab kuj txhawb kom peb qhib ib nplooj ntawv tshiab rau yav tom ntej ci ntsa iab.

NSEN ua haujlwm nyuaj heev, sim ua ib hom valve uas cov neeg siv khoom tuaj yeem ntseeg siab, peb yeej ib txwm txais tos koj tuaj xyuas peb tiv tauj peb txhua lub sijhawm!

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