State system for ensuring the uniformity of measurements. State verification schedule for variable pressure measuring instruments in the range from 1·10 2 to 2,5·10 7 Pa for frequencies from 5·10 -1 to 1·10 4 Hz and durations from 1·10 -5 to 10 s under constant pressure up 5·10 6 Pa
Petroleum products. Determination of aromatic hydrocarbon types in middle distillates. High performance liquid chromatography method with refractive index detection
