Russian standards PDF
Signal conversion equipments for simultaneous duplex data transmission on the switched channels general telephone network with the speed 2400 bit/s. Types and basic parameters
Document status: Active
Interface of serial radial type for dispersed object automated control systems. General specifications
Document status: Active
Jig bushes and accessories for drilling purposes. Dimensions
Document status: Active
Electrical installations of buildings. Part 4. Protection for safety. Protection against electric shock
Document status: Withdrawn