Testing Company and Testing Qualification 检测单位及检测人员资格
SNT-TC-1A Recommended Practice for Personnel Qualification and Certification in Nondestructive Testing
SNT-TC-1A 关于无损测试作业人员资格认定与证书的意见
Records are maintained of specifications, supplier qualification and testing to ensure product meets purity, strength and composition.
保留规格，供应商资质与测试记录以保证产品满足纯度，功能与组成。
En 473 Non-Destructive Testing-Qualification And Certification Of NDT Personnel-General principles.
EN 473无损测试人员认证和证书——通用标准。
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