PEG mndandanda liniya kalozera amatanthauza otsika mbiri mpira mtundu liniya kalozera ndi mizere inayi zitsulo mipira mu arc groove dongosolo amene akhoza kunyamula katundu mkulu katundu mbali zonse, mkulu okhwima, kudzikonza okha, akhoza kuyamwa kulakwitsa unsembe wa okwera pamwamba, mbiri otsika izi ndi chipika chachifupi ndi choyenera kwambiri pazida zazing'ono zomwe zimafuna makina othamanga kwambiri komanso malo ochepa.Kupatulapo wosungira pa block amatha kupewa mipira kugwa.