Ivalvu yeButterfly eQhelekileyo eNgqamza
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Ivalvu yebhabhathane ejijekileyo ejikelezileyo
Funda ngokugqithisileyoIvalvu yebhabhathane ejijekileyo ene-eccentric iqulethe i-disc seal ehlala iqinile kwaye inendawo yokuhlala yomzimba edibeneyo. Ivalvu ineempawu ezintathu ezikhethekileyo: ubunzima obuncinci, amandla angakumbi kunye ne-torque ephantsi.
