http://digilab.ptb.de/vocab/http://digilab.ptb.de/vocab/skos/66253influence quantity http://digilab.ptb.de/vocab/skos/66253 basic terms BT http://digilab.ptb.de/vocab/skos/66253 disturbance RT http://digilab.ptb.de/vocab/skos/66253 influence factor RT http://digilab.ptb.de/vocab/skos/66253 rated operating condition RT http://digilab.ptb.de/vocab/skos/66253 indication RT