Ụlọ nyocha maka ụkpụrụ gị dị elu
Lablọ nyocha CheeYuen nwere igwe nnwale dị iche iche iji mesie ịdị mma nke ihe nwere agba agba.A kwadebere ụlọ nyocha anyị nwere Gravelometer, igwe nnwale okirikiri okpomọkụ, igwe nnwale plating, akụrụngwa nnwale corrosion (CASS), ngwa peel maka nnwale adhesion, nnwale sulfate maka nguzogide corrosion ya, nnwale ikpo ọkụ iji jide n'aka na ọ nweghị ọnya ọ bụla. akụkụ obe kụpụtara, wdg.