The category is Industrial Fuel: A fuel is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work. The heat energy released is converted into mechanical energy via an engine, which includes uses like illumination.
Parent categories: Metallurgy, Plastics, Rubber, Chemicals & Energies
Related categories:
Machinery Industrial Parts, Tools and Fabrication
Commercial, Home, Lights, Construction Accessories & Materials