four sound track stereo radio  四声道立体声收音机

multiple sound track  复声道

Optical Sound Track  光录声迹

photographic sound track  相片声迹

sound track  声道; 声路; 声波沟迹; 录音道; 声迹; 空间-间隔-间距-留空白; 音轨; 声带; 声带音乐

sound track printer  声带印片机

sound-track engraving apparatus  录音机; 声迹刻纹机

two sound track stereo radio  双声道立体声收音机

going on the track of sound progress  走上良性发展的轨道

engineering district；maintenance of way section；track division；track district；track maintenance division  工务段

a sound mind in a sound body  有健康的身体才有健康的精神

infra-audible sound (=infrasonic sound)  次声

rate of sound and attenuation of sound  声速和声衰减

sound absorption-sound insulation-vibration isolation technology  吸声-隔声-隔振技术

sound intensity and sound intensity level  声强与声强级

sound navigation and ranging or sound radar  听测器; 声纳

sound pressure and pressure level of sound  声压与声压级

sound-on-sound  迭音

jointless line；continuously welded rail track；jointless track  无缝线路

non-NTDS track {dummy track}  非开战术系统资料追瞄