验定 meaning in English

assaying

Shore hardness test - verification of testing machines
肖氏硬度试验.试验机的验定
Measurement and associated instrumentation quality assurance for radioassay laboratories
放射验定实验室的测量和相关仪器质量保证
Calibration and usage of dose calibrator ionization chambers for the assay of radionuclides
验定放射性核素剂是校准器电离室的校正和使用
Calibration and usage of thallium - activated sodium iodide detector systems for assay of radionuclides
验定放射性核素用铊活化碘化钠检测器的校正和使用