http://digilab.ptb.de/vocab/http://digilab.ptb.de/vocab/skos/66261legal metrology http://digilab.ptb.de/vocab/skos/66261 Metrology and its legal aspects BT http://digilab.ptb.de/vocab/skos/66261 legal metrological control RT http://digilab.ptb.de/vocab/skos/66261 metrological authority RT http://digilab.ptb.de/vocab/skos/66261 legal metrology regulation RT http://digilab.ptb.de/vocab/skos/66261 International System of Units RT http://digilab.ptb.de/vocab/skos/66261 measuring instrument RT http://digilab.ptb.de/vocab/skos/66261 conformity assessment RT http://digilab.ptb.de/vocab/skos/66261 metrology RT