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Anodizing of aluminium and its alloys. Assessment of quality of sealed anodic oxidation coatings by measurement of admittance. Original standard UNE-EN ISO 2931-2018 in PDF full version. Additional info + preview on request

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Metallic materials. Knoop hardness test. Table of hardness values. Original standard UNE-EN ISO 4545-4-2018 in PDF full version. Additional info + preview on request

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Technical product documentation. Simplified representation of pipelines - General rules and orthogonal representation. Original standard UNE-EN ISO 6412-1-2018 in PDF full version. Additional info + preview on request

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Technical product documentation. Simplified representation of pipelines - Isometric projection. Original standard UNE-EN ISO 6412-2-2018 in PDF full version. Additional info + preview on request

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Technical product documentation. Simplified representation of pipelines - Terminal features of ventilation and drainage systems. Original standard UNE-EN ISO 6412-3-2018 in PDF full version. Additional info + preview on request

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Destructive tests on welds in metallic materials. Fracture test. Original standard UNE-EN ISO 9017-2018 in PDF full version. Additional info + preview on request

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