On the basis of the physical principles and characters of nondestructive testing (NDT) methods, as well as the metrological law and the definition of metrological instrument, it is concluded that nondestructive flaw detectors are not metrological instrume
On the basis of the physical principles and characters of nondestructive testing (NDT) methods, as well as the metrological law and the definition of metrological instrument, it is concluded that nondestructive flaw detectors are not metrological instrume
分析无损检测的原理和特征，根据计量法和计量器具定义得出无损探伤仪不是计量器具的结论。