Letoto le Feletseng la Lihlahisoa
Joaloka e mong oa baetsi ba li-valve ba ka sehloohong Chaena, COVNA esale e tsitlallela ho R&D, moralo le tlhahiso ea li-valve ho tloha 2000, le ho holisa letoto la lihlahisoa tsa eona ho fihlela litlhoko tsa liindasteri tse fapaneng le ho thusa indasteri ho rarolla litharollo tsa taolo ea ts'ebetso.
Ntle le moo, re boetse re fana ka letoto le fapaneng la li-valve actuator ho fihlela litlhoko tsa hau tsa actuation.Li-activator tse fapaneng li u thusa ho hlokomela taolo e hole le ho ntlafatsa ts'epahalo ea boenjiniere.