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超声波探伤试块校准规范
Calibration Specification for Blocks used in Ultrasonic Testing
价格：￥0.00
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电声学 飞机噪声测量仪器 运输机噪声评定用1/3倍频程声压级测量系统的性能要求
Electroacoustics. Instruments for measurement of aircraft noise-Performance requirements for systems to measure on-third-octave band sound pressure levels in noise certification of transport-category aeroplanes
价格：￥0.00
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电声学 测量电容传声器电声性能的测量方法
Electroacoustics - Measurement methods of electroacoustic characteristics for measurement condenser microphones
价格：￥0.00
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电声学 测量电容传声器通用规范
Electroacoustics - General specification of measurement condenser microphones
价格：￥0.00
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相位噪声测量系统检定规程
Verification Regulation of Phase Noise Measurement System
价格：￥0.00
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音频分析仪校准规范
Calibration Specification for Audio Analyzer
价格：￥0.00
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声功率计校准规范
Calibration Specification for Sound Powder Meters
价格：￥0.00
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彩色多普勒超声诊断仪（血流测量部分）校准规范
Calibration Specification for Color Doppler Ultrasound Diagnostic Equipments.Blood Flow Measurement
价格：￥0.00
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