摘要
Some trends in foreign NDT,Ma Minggang,Non Destructive Testing,11(1989 ),No.2,41.Ultrasonic thickness gauge and its tendency,Zhang Qingxi,Non destructive Testing,11 (1989 ),No.7,187.Analysis of acoustical Properties of listening rooms,Zhu Feng.Audio Engineering,1989,No.1,6Exploration on popularization and application of AM stereo technique in the field of medium-wave broadcasting inChina,Zhang dumin,Audio Engineering,1989,No.3,33.On the development of mode experiment and its analysis(3),Zhang Lingmi,Journal of Vibration and shock,8 (1989),No.1,52.A review of ship vibration research in China(1 ),Guo rixiu,Suo Zhiqiang,Journal of Vibration and shock,8 (1989 ),No.161.
