bulk wave meaning in English

体波

As one of the most potential experimental stress measurement , ultrasonic technique was widely developed and applied in recent years . limited by their own characters , bulk wave and surface wave in ultrasonic frequency are difficult to be used to measure the internal tangent stress condition from the surface of medium . in many occasions , they will not be able to evaluate the working condition of mechanical components effectively
超声波技术作为最有潜力的实验应力测量技术之一,近年来得到了广泛的发展和应用,然而超声体波与表面波由于其自身的限制性,均无法从表面测量内部的切向应力状况,在许多场合下无法有效进行机械构件工作状态的评估。