GOST 17498-72

Lasers and laser-related equipment. Test methods for laser beam widths, divergence angles and beam propagation ratios. Part 3. Intrinsic and geometrical laser beam classification, propagation and details of test methods

Energy efficiency. Submersible bladed pumps and electric motors for oil production. Energy efficiency classes

Sesame cake. Specifications

Stop valves for thermal power-stations. Types and main parameters

Secondary cells and batteries containing alkaline or other non-acid electrolytes. Secondary lithium cells and batteries for use in industrial applications

Polymer composites. Calculation of normative values for structural materials