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GB/T 23901.3-2019
Non-destructive testing—Image quality of radiographs—Part 3:Image quality classes
GB/T 37540-2019
Non-destructive testing—Digital image processing and communication for eddy current testing
GB/T 23901.5-2019
无损检测 射线照相检测图像质量 第5部分:双丝型像质计图像不清晰度的测定
Non-destructive testing—Image quality of radiographs—Part 5: Determination of the image unsharpness and basic spatial resolution value using duplex wire-type image quality indicators
GB/T 24583.1-2019
Vanadium-nitrogen—Determination of vanadium content—Ammonium ferrous sulfate titration method
GB/T 24583.3-2019
Vanadium-nitrogen—Determination of nitrogen content—Distillation-neutralization titration method
GB/T 37573-2019
Technical specification for annual evaluation of the stability of open-pit coal mine slopes