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ultrasonic field
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ultrasonic field
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水声计量
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ultrasonic field
超声声场
充满超声波的空间或超声振动所波及的部分介质。具有一定的空间大小和形状,根据超声应用可将其分为医用超声换能器声场和工业超声换能器声场。
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Gulf of Riga
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Guliang Commentaries on the Spring and Autumn Annals
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Gulliver's Travels
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