Makina opopera amakhala kutsogolo kwa mbali yopopera ya ng'anjo yotenthetsera.Ndi chipangizo chomwe chimagwiritsidwa ntchito potulutsa ma slabs otenthetsera mu ng'anjo yowotchera ndikuyika pama roller opopera bwino.Ikhoza kutulutsidwa kamodzi kapena kawiri kawiri molingana ndi ma slabs a kutalika kosiyana.zakuthupi.