I. Ngokwamandla 1. Ivalvu ezenzakalelayo: thembela emandleni ayo okusebenza ivalvu.Njenge-valve yokuhlola, i-valve yokunciphisa ingcindezi, i-valve yesicupho, i-valve yokuphepha, njalonjalo.2. I-valve yokushayela: thembela kubasebenzi, ugesi, i-hydraulic, i-pneumatic, namanye amandla angaphandle ukuze usebenzise i-valve.Okunjalo...
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