GOST 25871-83

Instruments for measurement of surface roughness by the profile method. Contact profilographs and profilometers. Types and main

Automobile roads and aerodromes. Unevenness measurement methods for base courses and pavements

Slots for screws and wood screws. Dimensions

Refractories and refractory raw materials. Methods of true density determination

Machine-made foot-wear of artificial and synthetic leather. Specifications

State system for ensuring the uniformity of measurements. Acoustics. Reference zero for the calibration of audiometric equipment. Part 5. Equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz