ultrasonic velocity measurement principle
关键词：牛乳成分；超声声速测定原理；电子检测仪器 [gap=831]Key words~milk composition；ultrasonic velocity measurement principle；electronic detector
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ultrasonic velocity measurement principle
超声波测速原理
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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This paper introduced the flow measuring principle of time-difference method of ultrasonic flow meter and the flow calculating method in flow measurement with velocity instrument.
论述了流速仪法测流及水轮发电机组现场效率试验的原理和计算方法。
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