The document specifies the grades and codes, technical requirements, test methods, inspection rules, Encasement, marking, transportation, storage, accompanying documents and contents of the order form for nickel-cobalt-manganese three-element composite oxides. Applicable to nickel-cobalt-manganese three-element composite oxides. A series of normative documents are cited in the document, including the determination of metal powder Loose Bulk Density, powder sampling method for powder metallurgy, gas adsorption BET method for determination of specific surface area of solid substances, etc. Terms and definitions are not defined in this document. The composition of the grades and codes involves the chemical formula of the product, including Ni, Co, Mn and oxides. The specific grades are composed of capital letters NCMO and 6 digits. The numbers represent the quantity fraction of each elemental substance.