Izimpawu zemishini, ezibizwa nangokuthi izingqimba zokuphela, zinokusebenza okuthembekile, ukuvuza okuncane, impilo ende yesevisi, ukusetshenziswa kwamandla okuphansi, akudingi ukugcinwa njalo, futhi kungakwazi ukuzivumelanisa nokuzenzakalelayo kwezinqubo zokukhiqiza kanye nokushisa okuphezulu, izinga lokushisa eliphansi, ukucindezela okukhulu, i-vacuum, isivinini esikhulu kanye ne-var...
Funda kabanzi