◆ Si ballaaran loo isticmaalo goynta birta aan la taaban karin, birta kaarboon, birta manganese, birta guga, alloy titanium, xaashi galvanized, saxan aluminium, naxaas ah, naxaas iyo walxo kale oo bir ah.
◆Nooca aadka u sarreeya, wax goynta biraha gaarka ah.
◆Waxa loo isticmaalaa bir wareegsan, tuubo labajibbaaran, bir qaabaysan L, Bir qaabaysan, iwm.