Natural gas. Determination of composition with defined uncertainty by gas chromatography method. Part 3. Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns
State system for ensuring the uniformity of measurements. State special standard and state verification schedule for means measuring radiation field parameters of antenna systems with operating dimensions of apertures from 0,40 to 0,75m at the frequency range from 8.2 to 40,0 GHz
