...; 超声空气动力学,超声速空气动力学,超声速气体动力学,超音速空气动力学,超音速气体动力学 supersonic aging ==> 超声波时效 supersonic aircraft ==> 超音速飞机 ..
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讨论了20钢高温时效组织与超声波速度间的相关性。
The correlation between ultrasonic velocity and microstructure in 20g aged at high temperature is discussed.
自动超声波检测技术具有检测效率高和成本低的特点,满足了海底管线铺设时效性要求和焊缝质量控制要求。
AUT has the characters of high efficiency and low costs of testing, which can meet the requirement of time limitation and quality control of welding seam in constructing submarine pipeline.
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