The steel fiber concrete with fly ash and slag of different ages by ultrasonic detection and compression strength were tested.
对一批不同龄期的掺粉煤灰或矿渣的钢纤维混凝土试件进行了超声波检测及抗压强度试验。
The Plane Piston Transducer has been widely used in Ultrasonic detection and other Ultrasonic application technologies for a long time.
平面活塞型超声换能器是长期来在超声检测以及其它超声应用技术中广泛采用的一种换能器类型。
The author introduces a pipe defect locating method by contact type ultrasonic detection — finger oil dipping touching method and analyses the theoretical basis of defect locating by this method.
介绍了钢管接触法超声波探伤缺陷定位方法——手指蘸油触摸法，分析了利用此种方法进行缺陷定位的理论依据。
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