The CIPM Mutual Recognition Arrangement (CIPM MRA) is the framework through which National Metrology Institutes demonstrate the international equivalence of their measurement standards and the calibration and measurement certificates they issue. The outcomes of the Arrangement are the internationally recognized (peer-reviewed and approved) Calibration and Measurement Capabilities (CMCs) of the participating institutes. Approved CMCs and supporting technical data are publicly available from the CIPM MRA database (the KCDB)
Vietnam Metrology Institutes has 31 calibration and measurement capabilities (CMCs) published in Appendix C of the BIPM KCDB.
5.Time and Frequency http://kcdb.bipm.org/appendixC/country_list_search.asp?CountSelected=VN&type=TF