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1. Izinga lokushisa le-barrel: Isikhunta somjovo osayizi omkhulu esivela eChina sikutshela ukuthi lapho izinga lokushisa lomgqomo (ukushisa kweplastiki) liphezulu, ukudluliswa kwengcindezi kungcono futhi amandla okuncipha ancishiswa. Isikhunta somjovo osayizi omkhulu esivela eChina kukutshela ukuthi lapho usebenzisa isango elincane, izinga lokuncipha lisekhulu kakhulu ngenxa yokuqina kwesango kusenesikhathi. Ezingxenyeni zepulasitiki ezinezindonga ezijiyile, noma ngabe izinga lokushisa lomgqomo liphakeme, ukuncipha kwayo kusakhulu.