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毫瓦级超声功率计
Ultrasonic Power Meter for Milliwatt Level
价格：￥0.00
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听力计量器具
Measuring Instruments for Audiometry
价格：￥0.00
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空气声声压计量器具检定系统表
Verification Scheme of Measuring Instruments for Air Borne Acoustics Pressure
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无指向性声源校准规范
Calibration Specification for Omnidirectional Sound Sources
价格：￥0.00
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数字音频源校准规范
Calibration Specification for Digital Audio Sources
价格：￥0.00
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噪声统计分析仪
Noise Level Statistical Analyzers
价格：￥0.00
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瓦级超声功率计
Ultrasonic Power Meters for watt Level
价格：￥0.00
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声校准器
Sound Calibrators
价格：￥0.00
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实验室标准传声器(自由场互易法)检定规程
Verification Regulation of Laboratory Standard Microphones(Free-field Reciprocity Method)
价格：￥0.00
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