Uninzi lwemigangatho yeplanga inegrooves yokuqinisa imigangatho yeplanga emeleneyo.Emva kwe-buckling, umgangatho uya kubonakala ulula, kodwa kungcono ukubethelela izikhonkwane zomgangatho, ezinokuthi zenze umgangatho uzinzile, ungabi lula uku-arch, kwaye uthintele umgangatho ukuba ukhululeke. ukukhulula umphumo, kwaye unokusombulula ngempumelelo ingxaki yokunyathela isandi ngexesha lofakelo lomgangatho.
Ubude: 16mm ukuya 200mm
