Njengamanje, ama-valve ovemvane omlilo asetshenziswa kabanzi, njengamapayipi okukhipha amanzi kanye nesistimu yomlilo.Ngokuvamile, i-valve ye-butterfly enjalo idinga ukuba nezinzuzo zesakhiwo esilula, ukubeka uphawu okuthembekile, ukuvula ukukhanya nokugcinwa okulula.Okulandelayo isingeniso esifushane se-fir...
Funda kabanzi