iblade ejikelezayo yezolimo, iiblade zokulima ezitshayelwayo, iingcebiso zomlimi

Zonke iimveliso zenziwe ngentsimbi ye-boron esemgangathweni ophezulu, emva kokuyila nokulungisa ubushushu, ukuqinisekisa ukuba imveliso inokuqina okwaneleyo kunye nokumelana nokuguguleka. Iimveliso zithunyelwa eRashiya, eLithuania, eSpain nakwamanye amazwe, emva kovavanyo oluninzi lwemarike ngabathengi, ukusebenza kwayo kakuhle kukumgangatho ophezulu.