声板或背板裂纹——这是吉他干燥最显而易见的特征。
Cracked soundboard or back - This is a clear sign that the guitar has been dried out.
以往建筑声学图解法，只能解决特殊位置反声板的声波反射问题。
The former graphic method applied in architectural acoustics can only solve the problem of the reflecting sound wave with the sound reflecting board in special positions.
讨论了可用于液相环境下测量的声板波(APM)传感器的工作原理，并介绍了该传感器在物理、化学和生物检测中的应用。
The theory of acoustic plate mode (APM) sensor used in liquid phase in details is discussed. The design and the application of APM sensor in biology, chemistry and physics are presented.
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