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  4. Standard "UNE-ETS 300640ED1"
Standard UNE-ETS 300640ED1 1.12.2022 preview

UNE-ETS 300640ED1

Human Factors (HF);Assignment of alphabetic letters to digits on standard telephone keypad arrays (Endorsed by Asociación Espanola de Normalización in December of 2022.)

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STANDARD published on 1.12.2022


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The information about the standard:

Designation standards: UNE-ETS 300640ED1
Publication date standards: 1.12.2022
SKU: NS-1127668
Approximate weight : 300 g (0.66 lbs)
Country: Spanish technical standard
Category: Technical standards UNE

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