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
Low-voltage switchgear and controlgear. Part 5-3. Devices and switching elements of control circuits. Requirements for proximity devices with defined behaviour under fault conditions
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