State system for ensuring the uniformity of measurements. Standard reference data. Niobium. The parameters of the crystal lattice. Coefficient of linear thermal expansion from 120 K to 400 K
State system for ensuring the uniformity of measurements. Metrological assurance. Assessment of state at industrial plants, organizations and corporations
State system for ensuring the uniformity of measurements. Reference gauge-blocks of the 1st and the 2nd accuracy orders and working gauge-blocks of 00 and 0 accuracy classes up to 1000 mm. Methods and means for verification
