Mabolidi opindika pansi ndi mtundu wa bolidi yoteteza kapena yowongolera magalimoto yomwe imamangidwa pansi pogwiritsa ntchito mabolidi m'malo moyikidwa mu konkire. Mabolidi amenewa amagwiritsidwa ntchito kwambiri m'malo omwe kuyika kosatha sikungatheke, kapena komwe kumafunika kusinthasintha pakuyika.