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声频功率放大器校准规范
Calibration Specification for Audio-frequency Power Amplifiers
价格：￥0.00
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超声流量计检定规程
Ultrasonic Flowmeters
价格：￥0.00
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工作标准传声器(耦合腔比较法)检定规程
Verification Regulation of Working Standard Microphones (Coupler Comparison Method)
价格：￥0.00
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1Hz～2kHz标准水听器检定规程
Verification Regulation of Standard Hydrophones in the Frequency Range 1Hz to 2 kHz
价格：￥0.00
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1kHz～1MHz标准水听器检定规程
Verification Regulation of Standard Hydrophones in the Frequency Range 1kHz to 1MHz
价格：￥0.00
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混凝土超声检测仪检定规程
V.R.of Ultrasonic Test instrument of Concrete
价格：￥0.00
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数字音频信号发生器
Digital Audio Generators
价格：￥14.00
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声强测量仪
The Measurement Instruments of Sound Intensity
价格：￥16.00
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阻抗听力计检定规程
Verification Regulation of Aural Impedance Audiometers
价格：￥18.00
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声波检测仪
Acoustic Detector
价格：￥14.00
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