Njengomshini wokuvula, wokuvala nokulawula wepayipi lokungena komoya kanye nokukhipha uthuli, i-valve yevemvane yokukhipha umoya ifanele ukushaywa komoya, ukususwa kothuli kanye nezinhlelo zokuvikela imvelo kwezensimbi, izimayini, usimende, imboni yamakhemikhali kanye nokuphehla ugesi.Ivemvane lokungenisa umoya v...
Funda kabanzi