Explosive atmospheres. Rules of conformity assessment of quality management systems of service facilities providing inspection and maintenance of Ex installations for use in explosive atmospheres
State system for ensuring the uniformity of measurements. State hierarchy scheme for measuring instruments of the content of organic components in liquid and solid mediums and materials. Transfer of the units from the state primary standard based on liquid and gas chromato-mass-spectrometry with isotope dilution and gravimetry
Electric and optical fibre cables. Test methods for non-metallic materials. Part 401. Miscellaneous tests. Thermal ageing methods. Ageing in an air oven
