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Heat-treatable steels, alloy steels and free-cutting steels Part 1- Non-alloy steels for quenching and tempering (ISO 683-1-2016). Original standard UNE-EN ISO 683-1-2019 in PDF full version. Additional info + preview on request

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Heat-treatable steels, alloy steels and free-cutting steels Part 4- Free-cutting steels (ISO 683-4-2016). Original standard UNE-EN ISO 683-4-2019 in PDF full version. Additional info + preview on request

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Water quality Determination of free chlorine and total chlorine Part 2- Colorimetric method using N,N-dialkyl-1,4- phenylenediamine, for routine control purposes (ISO 7393-2-2017). Original standard UNE-EN ISO 7393-2-2019 in PDF full version. Additional info + preview on request

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Paints and varnishes Determination of water-vapour transmission properties Cup method (ISO 7783-2018). Original standard UNE-EN ISO 7783-2019 in PDF full version. Additional info + preview on request

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Medical electrical equipment - Part 2-55- Particular requirements for the basic safety and essential performance of respiratory gas monitors (ISO 80601-2-55-2018). Original standard UNE-EN ISO 80601-2-55-2018 in PDF full version. Additional info + preview on request

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Welding Determination of Ferrite Number (FN) in austenitic and duplex ferritic-austenitic Cr-Ni stainless steel weld metals (ISO 8249-2018). Original standard UNE-EN ISO 8249-2019 in PDF full version. Additional info + preview on request

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