https://digilab.ptb.de/dkd/refType/vocab/https://digilab.ptb.de/dkd/refType/vocab/skos/90ruleMeasuringEquipment https://digilab.ptb.de/dkd/refType/vocab/skos/90 refTypeDCCUsageRule BT https://digilab.ptb.de/dkd/refType/vocab/skos/90 calibrationMedium RT https://digilab.ptb.de/dkd/refType/vocab/skos/90 measurementStandard RT https://digilab.ptb.de/dkd/refType/vocab/skos/90 referenceMeasurementStandard RT https://digilab.ptb.de/dkd/refType/vocab/skos/90 measuringDeviceLength RT https://digilab.ptb.de/dkd/refType/vocab/skos/90 medium RT