- 超声波: ultrasonic; pretersonic; sup ...
- 测距: range finding; distance meas ...
- 几种超声波测距电路: rar
- 声波测距: sound ranging◇声波测距台 sound-ranging station; 声波测距仪 sound ranger
- 声波测距法: ranging method of sound wave; sound ranging; soundranging
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