... simultaneous technique,同时联用技术；同时并用技术 sing around method,声环法 sing-around velocimeter,环鸣声速仪 ...
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Improved method of Sing-Around 改进的回鸣法
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Sing-around method for sound velocity measurement have found wide acceptance because it is simple in circuitry and high in accuracy.
环鸣测量声速法具有电路简单、使用方便、测量精度高等优点，已广泛地应用。
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