GB/T 40023-2021无损检测仪器超声衍射声时检测仪技术要求标准
英文:Non-destructive testing instruments—Ultrasonic time-of-flight diffraction instrument—Technical requirements GB/T 4002...
英文:Non-destructive testing instruments—Ultrasonic time-of-flight diffraction instrument—Technical requirements GB/T 4002...