短脉波声波回迹鉴定技术
acoustic short-pulse echo classification technique {ASRAPS
电磁超声波
electromagnetic ultrasonic waves
地下声波勘探技术
subsurface sonic exploring technique
地下声波
Underground acoustic wave
低强度脉冲超声波
low intensity pulsed ultrasound
低频声波振动
low-frequency wave vibration
低频声波吹灰器
Low frequency acoustic wave soot blower
Sonic sootblower with lower frequency
低剂量脉冲超声波
low intensity pulse ultrasound
low-intensity pulsed ultrasound