Ezi mveliso zilungele umswakama-ubungqina, ubungqina obukhanyayo kunye nokupakishwa kwe-vacuum yezixhobo ezinkulu zokuchaneka kwe-Portional Precination, izixhobo zobukhulu bemichiza kunye namayeza aphakathi. Isakhiwo samanqanaba amane samkelwa, esinemisebenzi yamanzi elungileyo kunye neoksijini. Inlimi, unokwenza iingxowa zokupakisha iingcaciso ezahlukeneyo kunye nezitayile, kwaye zinokwenziwa kwiingxowa zeflethi, iingxowa ezikhulu, iingxowa zelungu kunye nezinye izitayile.