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发声器--探测器--声探测器
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电子通信与自动控制技术词汇手册
sounder
发声器;探测器;声探测器
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direct teaching
direct test
direct thermal stratification
direct trade
direct traffic
direct transition
direct transition semiconductor
direct transmission factor
direct trans-shipment order
direct underwriting
direct use of seawater
direct utility function
direct variation
direct verification
direct verification approach
direct viewing tube
direct-view thermal imaging tube
direct-vision method
direct vision objective prism
direct vision prism
direct vision prism
direct vision spectrograph
direct vision spectroscope
direct-vision viewfinder
direct vision viewfinder
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