Ikhethini lomoya elishisisa ngogesi ukuze lisetshenziswe ngokuphepha, i-motor egcwele amandla igcina isivinini somoya esizinzile,I-PTC esebenza kahle yokushisisa okuqhubekayo,Umoya onamandla gcina umnyango ongabonakali,I-PTC kagesi engashajwanga ukuphepha okwengeziwe ukuze isetshenziswe.