1.Umzimba wevalve kunye ne-spool zenziwa ngezinto ezimgangatho ophezulu, umsesane ongenisiweyo ongeniswayo unobomi obude, ukungachaneki okuphezulu, akukho msebenzi we-oyile, ngaphandle kokuthintela i-valve ye-valve kunye netywina ukuba lonakaliswe luxinzelelo olugqithisileyo. 2.Uhlobo lwe-volocantication yenqanaba lokuhamba kweendaba luhlengahlengiswa, ubungakanani kwaye luchanekile, oluchanekileyo kunye nokulungisa ngokukhawuleza, ukhuselekile kwaye uthembekile. 3.Inxalenye yeTywina incitshisiwe, itywina langaphakathi lebhulukhwe liphuculwe, lisenza umzimba wevali, ukuxhathisa kunye nokuhlala.
