Optics and photonics. Lasers and laser-related equipment. Standard optical elements. Part 1. Standard optical elements for laser equipment operating in the ultraviolet, visible and near-infrared spectral ranges. General technical requirements
Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and -165 °C. Part 5. Testing, drying, cleaning and cooling
State system for ensuring the uniformity of measurements. State verification schedule for instruments measuring the content of components in liquid and solid substances and materials. Transfer of the units from the state primary standard based on coulometric titration
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