Na-ejuputa ngwaahịa mmanụ, gụnyere mmanụ oriri na mmanụ ụlọ ọrụ.Mmanụ oriri bụ ogidi ụlọ ọrụ akụ na ụba mba, bụ otu n'ime nri ndị bụ isi na ndụ anyị kwa ụbọchị, dịka mmanụ ahụekere, mmanụ nkwụ, mmanụ agwakọta na ihe ndị ọzọ.Industrial mmanụ na-tumadi lubricating mmanụ, na elu ogo nke ulo oru automation taa, ụdị nile nke n'ibu ngwá enweghị ike na-arụ ọrụ na-enweghị lubrication, nnọọ mbara nso nke ojiji.