Online Standards Store PDF
Optical fibres. Part 1-46. Measurement methods and test procedures. Monitoring of changes in optical transmittance
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Microscopes. Screw threads for objectives. Dimensions
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Communication networks and systems in substations. Part 5. Communication requirements for functions and device models
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Fibre-optic, radio-relay and satellite main channels of digital TV signals transmission systems. Basic parameters and methods of measuring
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Printed circuit boards. Physical parameters test methods
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Information technology. Cryptographic data security. Block ciphers
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