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Magnetic heads for tape recorders. General specifications
Document status: Active
Printing teletypes for 5-element code. Reliability test methods
Document status: Active
Two-way antennas for central (base) and mobile land radio and their characteristics. Basic parameters. Technical requirements
Document status: Active
Phototechnical and photographic amateur films. Marking and packing
Document status: Active
Reprography. Micrography. Microforms with diazofilms. Optical density requirements and methods of control
Document status: Active