Sociological aspects (2) Science (2) Energy conservation (2) Ahorro de energía (2) Ciencias (2) Sociología (2) Industria (2) Sociologie (2) Industrie (2) Publics (2) Sociologie (2) Grande distribution (2) Industrie (2) Économies d'énergie (2) Sciences (2) artisanat (2) Employment (1) Brakes (1) Levers (1) Industrialists (1) Rates (1) Occupations (1) Equipment and supplies (1) Equipment (1) Effectiveness (1) Surfaces (1) Frenos (1) Superficies (1) Trabajo (1) Enquête (1)