A Biofuel is a type of fuel whose energy is derived from biological carbon fixation. Biofuels include fuels derived from biomass conversion, as well as solid biomass, liquid fuels and various biogases.
"a manual usually accompanying a technical device and explaining how to install or operate it"
Essential Requirements - Medical Device Directive 93/42/EEC - Annex I, 13.1:
Each device must be ...