State system for ensuring the traceability of measurements. Geometrical product specifications (GPS). Filtration. Part 21. Linear profile filters. Gaussian filters
State system for ensuring the uniformity of measurements. Standard reference data. Silicide of vanadium. The lattice parameters in the concentration range from 20 at.% to 25 at.% of silicon. Coefficient of linear thermal expansion in the range from 20 K up to 300 K
