Isicelo:
Lo matshini usetyenziswa ikakhulu ekuphawuleni iiprofayili zealuminium emgceni, edityaniswe kwityathanga elikhulu lemveliso. Ubude beemveliso bumalunga neemitha ezi-3.1, ziphawulwe nge-5mm nganye. Umgca wemveliso umalunga neemitha ezi-3 ukuya kwezi-5 ngomzuzu.