Li-valve tsa mofuta oa "NSEN" esale li natefeloa ke botumo bo botle indastering.
Li-valve tsa hau tse phethahetseng ke tabatabelo ea rona.
NSEN e thehiloe ka 1983, ke khoebo ea mahlale le thekenoloji ka ho khetheha e etsang tšepe ho tiisa li-valve tsa serurubele le ho kopanya nts'etsopele ea li-valve, tlhahiso, thekiso le litšebeletso.
Ho feta lilemo tse 30 tsa boiphihlelo, NSEN e thehile sehlopha se tsitsitseng sa litalenta tsa boleng bo holimo, ho tsona litheknishiene tse fetang 20 tsa litlotla tse phahameng le tsa maemo a holimo li ntse li etsa…
Bakeng sa lipotso mabapi le lihlahisoa tsa rona kapa lethathamo la litheko,
ka kopo re siele lengolo-tsoibila la hau mme re tla ikopanya le rona nakong ea lihora tse 24.