https://digilab.ptb.de/dkd/refType/vocab/ Metrology Database German Calibration Service (DKD) metrology, reference types, digital calibration certificate, certificate of conformity German Calibration Service (DKD) 2023-06-19 en-US 2025-09-09 12:48:37 2025-09-29 08:03:01 itemOutputRange 2025-09-09 12:48:37 2025-09-29 08:03:01
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