Ivelufa yebhabhathane luhlobo lwevalvu esebenzisa uhlobo lwediski lokuvula nokuvala iindawo ukujikeleza malunga ne-90 ° ukuvula, ukuvala okanye ukulawula ukuhamba ngokuphakathi. Ivelufa yebhabhathane ayisiyonto ilula kuphela kulwakhiwo, ngobukhulu obuncinci, ukukhanya ngobunzima, ukutya okuphantsi, ubuncinci kubungakanani bokufakwa, encinci ukuqhuba ...
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