id	keyword
fumecheng-12430	attenuation
fumecheng-12430	sound
fumecheng-12430	wave
fumecheng-12430	solution
fumecheng-12430	wave attenuation
fumecheng-12430	coefficient
fumecheng-12430	attenuation coefficient
fumecheng-12430	mhz
fumecheng-12430	temperature
fumecheng-12430	frequency