Terms containing echo technique

Subject	English	Chinese
mil., air.def.	echo technique	回波反射信号技术
shipb.	echo technique	回波技术
mining.	pulse echo technique	脉冲反射探伤法
tech.	pulse echo technique	超声波探伤的脉冲反射法
chem.	spin-echo technique	自旋回波技术
tech.	spin echo technique	自旋回声技术