Specification and qualification of welding procedures for metallic materials. Welding procedure test. Part 5. Arc welding of titanium, zirconium and their alloys
Information technology. Automatic identification and data capture techniques. Bar code verifier conformance specification. Part 1. Verifier of linear symbols
Explosion-protected electrical apparatus. Part 12. Classification of mixtures of gases or vapours with air according to their maximum experimental safe gaps and minimum igniting currents
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