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新的导管周围低回声信号到底代表什么？
What the heck is this new periductal hypoechoic sign?
youdao
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水下目标回声信号的检测是主动声纳目标识别的重要内容。
Detection of echo signal is an important part of underwater object recognition.
youdao
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水下目标回声信号的检测是主动声纳目标识别的重要内容。
Detection of echo signal is an important part of underwater object recognition.
youdao