Isikhokelo esincinci se-STW yintsimbi engenasici.Intsimbi engatyiwa (intsimbi) imfutshane kwintsimbi engaxutywanga neasidi, ukumelana nomoya, umphunga, amanzi kunye nokunye okubuthathaka okuphakathi okanye intsimbi eneempawu ezingatyiwayo ezibizwa ngokuba yintsimbi engatyiwayo.