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
Ophthalmic optics. Uncut finished spectacle lenses. Part 5. Minimum requirements for spectacle lens surfaces claimed to be abrasion-resistant. Test methods
€10
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