YIHO Pulley dib u dhac ayaa lagu sameeyaa iyada oo loo marayo boqollaal qaybood oo dhoobada dhoobada ah oo shakhsi ahaan loo qoondeeyey taarikada caagga ah ee raagaya, foornada dhoobada dhoobada ah ee kasta oo la dabaqay ayaa kor u qaaday dimples si ay u caabbinta abrasion. jiidashada si looga hortago simbiriirixidda, kordhinta nolosha rullaluistudhka.
Taas oo ka dhigaysa nolosha rullaluistemadka wadista toban jeer in ka badan durbaankii asalka ahaa . Isla mar ahaantaana, xaashi kasta oo dhoobo ah ayaa jeexjeexan masaafo gaar ah, taas oo u sahlaysa arrimaha shisheeye sida boodhka, wasakhda durbaanka laga siidaayo godka, taas oo ka dhigaysa durbaanka shaqo gaar ah oo is-nadiifinta, gaar ahaan ku habboon jawiga shaqada qoyan.Alumina dhoobada dhoobada dhoobada ayaa leh qiyaaso kala duwan oo la heli karo.