GB/T 39239-2020无损检测超声检测不连续的特征和定量标准
英文:Non-destructive testing—Ultrasonic testing—Characterization and sizing of discontinuities GB/T 39239-2020介绍: 国家标准《无损检...
英文:Non-destructive testing—Ultrasonic testing—Characterization and sizing of discontinuities GB/T 39239-2020介绍: 国家标准《无损检...