GOST 21523.4-77

Rotating electrical machines of middle size. Mounting dimensions

Electromagnetic compatibility of technical equipment. Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz. Part 1. General requirements, frequency bands and electromagnetic disturbances

Colours of the cores of flexible cables and cords

Microwave ferrite devices. Methods of measurement of losses at high power level

Printed boards. Part 4-1. Rigid multilayer printed boards with interlayer connections. Sectional specification. Section 1. Capability Detail Specification. Performance levels A, B and C

Optical fibres. General specifications