Ama-valve omkhiqizo i-"NSEN" asebenedumela elihle embonini isikhathi eside.
Ama-valve akho aphelele yiwona esiwafisayo.
I-NSEN eyasungulwa ngo-1983, iyibhizinisi lesayensi nezobuchwepheshe elikhiqiza ngokukhethekile ama-valve e-butterfly ensimbi kuya kwensimbi futhi lihlanganisa ukuthuthukiswa kwama-valve, ukukhiqizwa, ukuthengisa kanye nensizakalo.
Ineminyaka engaphezu kwengu-30 yesipiliyoni, i-NSEN yakhe iqembu elizinzile elinamathalente asezingeni eliphezulu, kubo ochwepheshe abangaphezu kuka-20 beziqu eziphezulu kanye nabasezingeni eliphezulu bebelokhu behlanganyela…
Uma unemibuzo mayelana nemikhiqizo yethu noma uhlu lwamanani,
sicela usishiyele i-imeyili yakho futhi sizoxhumana nathi zingakapheli amahora angama-24.