Industrial Valves - Metallic butterfly valves This standard specifies requirements for butterfly valves having metallic bodies for use in flanged or butt welding piping systems and used for isolat...
Descripción: Welding consumables. General product standard for filler metals and fluxes for fusion welding of metallic materials
BS EN 12504-4 (2004)Full description
Personality Disorders and their diagnostic criteria
BS EN 13355-2004 + A1-2009
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Proiect la disciplina proiectarea dispozitivelorFull description
