GOST 26828-86

Low-voltage switchgear and controlgear. Part 5-8. Control circuit devices and switching elements. Three-position enabling switches

State system for ensuring the uniformity of measurements. State special standard and state verification schedule for instruments measuring surface roughness parameters Rmax, Rz in range from 0,001 to 3000 µm and Ra in range from 0,001 to 750 µm

State system for ensuring the uniformity of measurements. State primary standards and state verification schedule for means of measuring specific conductivity of solutions of electrolytes within the range of 1x10 in minus 4 degree to 1x10 in 2 degree Sm/m

Glass and glass products. Optical characteristics determination methods. Determination of luminous and solar characteristics

Unified system for design documentation. Graphical symbols in diagrams. Acoustic devices

Air quality. Assessment of uncertainty of a measurement method under field conditions using a reference method