GOST 7727-81

Centrifugal reinforced concrete posts for high-voltage transmission lines. Specifications

Electromagnetic compatibility of technical equipment. Immunity to dynamic voltage changes in power supply networks. Technical requirements and test methods

Drilling fluids. Laboratory testing

Check railway rails. Specifications

State system for ensuring the uniformity of measurements. Metals and alloys. Instrumental indentation test for hardness and other material parameters. Part 3. Technical requirements and calibration of reference test blocks

Tungsten concentrate. Methods of determination of sulphur