The igwe nwere obere ntụgharị radius, mgbanwe ọrụ na elu na-arụ ọrụ efficiency.It na-tumadi aku na mkpụmkpụ-anya ụgbọ njem nke obere na-ajụ-sized nnukwu ihe dị ka rụrụ ala, ájá, gravel, coal, mkpofu, etc.Shoveling na nyefe.A na-eji ya eme ihe n'ọdụ ụgbọ mmiri, ebe a na-ewu ihe owuwu, ụlọ ọrụ ájá na gravel, ogige osisi na oge ndị ọzọ.