The transverse vibration of composite engine block was so serious that it was necessary to take measures to improve this defect.
复合材料发动机机体的横向振动是比较严重，需要采取措施改善横向振动特性。
Objective:This article reports the clinical application of the "round block"purse string suture in the treatment of the skin defect.
目的：探讨如何应用环形缝扎术关闭皮肤缺损创面。
This paper introduces the theory calculation of shear wave reflection for block corner. And it derives the echo acoustic pressure theory calculation formula for block corner and its shape defect.
阐述了横波在端角反射中的理论方法计算，并推导端角及端角形缺陷的回波声压理论计算公式。
This paper introduces the theory calculation of shear wave reflection for block corner. And it derives the echo acoustic pressure theory calculation formula for block corner and its shape defect.
阐述了横波在端角反射中的理论方法计算，并推导端角及端角形缺陷的回波声压理论计算公式。
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