Kubomi bemihla ngemihla, sihlala sibhekisa kwimibhobho yesinyithi ngokudibeneyo njengemibhobho yentsimbi, kodwa kwicandelo lokusika imibhobho, kufuneka sahlule ukuba ingaba isinyithi ngumbhobho wentsimbi yecarbon, umbhobho wesinyithi sesinyithi, umbhobho wesinyithi, insimbi yombhobho we-titanium okanye umbhobho wealuminium alloy . Kuba izinto ezahlukeneyo zahlukile ...
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