{"tema_id":"1454","string":"primary national Rockwell standardizing machine           #00383","created":"2022-12-19 09:13:37","code":null,"notes":[{"@type":"Cataloger's note","@lang":"en-EN","@value":"reference: R039:2006 2.5 "},{"@type":"Cataloger's note","@lang":"en-EN","@value":"ID: 00383 "},{"@type":"Definition note","@lang":"en-EN","@value":"primary Rockwell hardness standardizing machine used by a country\u2019s primary national laboratory for hardness standardization to standardize primary reference test blocks. The primary national laboratory for hardness standardization is usually a National Metrology Institute (NMI). "}]}