Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; fire-extinguishing apparatus; flexible sheaths for electric conductors or for electric cables; thermocouple sheaths; sheaths for electric cables and wires; fire blankets; fireproof garments; fire-resistant clothing; fire-resistant gloves; asbestos safety screens for firemen; garments, clothes and shoes for protection against fire, accidents and irradiation