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Albanien – General Directorate of Metrology and Calibration of Albania – GDMC

Australien – National Measurement Institute – NMIA

Belgien – Ministry of Economy, Quality and Safety Department, Metrology Division

China – National Institute of Metrology, P.R. China – NIM

Kroatien – State office for Metrology – DZM

Dänemark – Dansk Fundamental Metrologi A/S – DFM

Deutschland – Physikalisch Technische Bundesanstalt – PTB

Finnland – Centre for Metrology and Accreditation – MIKES

Frankreich – Laboratoire National de Métrologie et d’Essais – LNE

Großbritannien – National Physical Laboratory – NPL

Italien – National Institute of Metrological Research – INRIM

Italien – Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti – ENEA-INMRI

Irland – National Standards Authority of Ireland – NSAI

Japan – National Metrology Institute of Japan – NMIJ

Kanada – National Research Council – NRC

Niederlande – Nederlands Metinstituut – NMi

Norwegen – Justervesenet

Polen – Central Office of Measures GUM

Portugal – Instituto Portugês da Qualidade – IPQ

Russland – All Russia D.I. Mendeleyev Scientific and Research Institute for Metrology – VNIIM

Slowenien – Standards and Metrology Institute – MIRS

Slowakei – Slovenský metrologický ústav – SMU

Schweden – Swedish National Centre of Metrology – SP

Schweiz – Bundesamt für Metrologie – METAS

Spanien – Entidad nacional de Acreditacion ENAC

Tschechische Republik – Czech Metrological Institute – CMI

Türkei – National Metrology Institute – UME

Ungarn – Hungarian Trade Licensing Office – MKEH

USA – National Institute of Standards and Technology – NIST