GOST 18777-80

Tea. Classification by particle size analysis

State system for ensuring the uniformity of measurements. Ultrasonic medical physiotherapy equipment. General requirements to measurement methods of acoustic output in the frequency range 0,5 MHz to 5,0 MHz

Flare straight fittings. Construction

System of design documents for construction. Normocontrol of design and working documentation

Optics and photonics. Optical materials. Method for measuring the nonlinearity coefficient of the refractive index

Reliability and safety requirements for space systems, complexes and unmanned spacecraft of unique (small series) production with long life of active operation