umgubho wezintsha oluhlupheka
Izintuba zesiThieli ezilungileyo ezinethemba lapho kuhlala indlela yomphilo wokuqaphepha, ezichasene ngokuphakamiswayo ngephakathi lokulandelekileyo nokulandelekiswa kwesisekelo esikhathini sakhona. Izintuba zizoba ngaphandle komseme wesibhedlela, ukuthi bafanele abe ngaphansi kanye neziwelded amadandavu. Indlela yokusebenzisa lokusebenza kuhlonipha imigomo engenayo okanye umdlalo omncane, ukuze zibe izintuba ezinethemba elungileyo nokubonisa okanye. Ukuthi liphinde lizobekwa ngokushesha, ifaka iindawo ezidinga ukukhangelwa kokugcina, ezithile kusuka we-±0.5% ku-±0.1% kwezindlela ezihlaleni. Izintuba zakhiwa ngokupheleleyo ngemibuzo yezinhlobo eziningi, phakathi kwezincinci leziThieli kanye namagreyde ebalulekileyo, ukuvumela ukusetshenziswa ngokuphambili kwezindlela ezifanekiso.