NBN-ISO 389-1992 5000 Acoustics Standard reference zero for the calibration of pure tone air conduction audiometers《声学 校准纯音响骨质传导听力计用标准参考零点》.pdf

相关资源

NBN E 18-001-1976 2500 《通过热电偶的比较进行的校准》.pdf

NBN T 97-101-1979 1875 Preparation of calibration gas mixtures - Weighing method《校准混合气的配制 称重法》.pdf

NBN T 97-104-1979 5625 Preparation of gas mixtures for calibratlon using permeation tubes《用渗透管配制校准混合气》.pdf

NBN T 97-102-1979 3125 Preparation of calibration gas mixtures - Manometric method《校准混合气的配制 测压法》.pdf

NBN T 97-107-1980 8750 Preparation of calibration gas mixtures using plastic bags《用塑料袋配制校准混合气》.pdf

NBN X 50-006-1988 6875 Quality assurance - Requirements for measurement and calibration Systems《质量保证 测量和校准系统的要求》.pdf

NBN T 97-103-1979 1250 Preparation of calibration gas mixtures - Method with mixing piston pumps《校准混合气的配制 混合活塞泵方法》.pdf

NBN E 17-005-1988 9375 《流量测量仪器的使用和校准中的不精确性的估计》.pdf

NBN T 97-106-1980 4375 Preparation of calibration gas mixtures - Preparation and or analysis certificate《校准混合气的配制 配制和（或）化验证书》.pdf

NBN T 97-110-1983 5625 Gas analysis - Preparation of calibration gas mixtures - Static volumetric methods《气体分析 校准混合气的配制 静态容积法》.pdf

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