The international patent classification table is divided into eight parts. What wave does chemical metallurgy belong to?

The international patent classification table is divided into eight parts, and chemical metallurgy belongs to part C.

The eight parts are: Part A: Life needs Part B: Homework; Transport part c: chemistry; Metallurgy department d: textiles; Paper-making part e: fixed building part f: mechanical engineering; Lighting; Heating; Blasting part g: physics part h: electricity

The chemical element groups in Part C are defined as follows: alkali metals: li, Na, K, Rb, Cs, Fr alkaline earth metals: La-series elements: elements with atomic number of 57 ~ 7 1; Rare earth metals: Sc, Y, actinides of lanthanide series: elements with atomic numbers from 89 to 103. Cl, Br, I, At inert gases: He, ne, Ar, Kr, Xe, Rn platinum group metals: Os, Ir, Pt, Ru, Rh, Pd noble metals: Ag, Au, platinum group metals light metals: alkali metals, alkaline earth metals, Be, al, Mg heavy metals: iron group metals except light metals: Fe, Co, mg. Halogen metal: transition element of elements other than nonmetal: elements with atomic numbers above 2 1 to 30,39 to 48,57 to 80,89.

Part C includes: a. Pure chemistry, including inorganic compounds, organic compounds, polymer compounds and their preparation methods; B applied chemistry, including compositions containing the above compounds, such as glass, ceramics, fertilizers, plastic compositions, coatings and petroleum industrial products. It also includes some compositions that are suitable for some purposes because of their special properties, such as explosives, dyes, adhesives, lubricants and detergents; C some marginal industries, such as coke manufacturing, solid fuel or gas fuel manufacturing, oil, grease and wax production and refining, fermentation industry (such as brewing and wine making) and sugar industry; D some operations or treatments, which are either purely mechanical (such as mechanical treatment of leather and hides) or partially mechanical (such as water treatment or general anti-corrosion); E. metallurgy, black alloy or non-ferrous alloy.