Russian standards PDF
Ophthalmic optics. Contact lenses. Part 2. Tolerances
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Ophthalmic optics. Contact lenses. Part 3. Measurement methods
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Ventilation for buildings. Performance testing of equipment for residential ventilation. Performance testing of non-ducted mechanical supply and exhaust ventilation units, including heat recovery
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Ventilation for buildings. Performance testing of equipment for residential ventilation. Performance testing of ducted mechanical supply and exhaust ventilation units, including heat recovery
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Thermistors. General requirements for parameter measurements
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Optics and photonics. Optical crystals. Method for determining chemical stability
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