Okokuqala, kuba iishelfu ezinzima kufuneka zenze umsebenzi olungileyo wokuhlela, ukuqinisekisa ukuba zonke iimveliso zibekwe ngolungelelwano, okwesibini, kuyafuneka ukuba kuqinisekiswe ukuba imveliso nganye inomgama othile phakathi komnye nomnye, ukuze kungabikho extrusion phakathi iimveliso, ukuze ilahleko yemveliso ...
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