Isethi yeshawa iqinisekisa ukuzizwisa komuntu siqu kweshawa ngeshawa yedome engaphezulu engu-250 mm neshawa yesandla enemisebenzi emi-3 elungisekayo.Ziwumphumela ophelele wombala ofanayo nesitayela, ukukhiqizwa kwekhwalithi ephezulu nokusebenza okuhle kakhulu, okukuqinisekisa isikhathi esihle sokugeza.