استاندارد ASTM E90-09

اختصاصی از فی ژوو استاندارد ASTM E90-09 دانلود با لینک مستقیم و پر سرعت .

Standard Test Method for
Laboratory Measurement of Airborne Sound Transmission
Loss of Building Partitions and Elements

IEC 60793:2014-Optical fibres – Part 1-51: Measurement methods and test procedures – Dry heat (steady state) tests

اختصاصی از فی ژوو IEC 60793:2014-Optical fibres – Part 1-51: Measurement methods and test procedures – Dry heat (steady state) tests دانلود با لینک مستقیم و پر سرعت .

IEC 60793:2014-Optical fibres – Part 1-51: Measurement methods and test procedures – Dry heat (steady state) tests

IEC TS 62129-3:2014-Calibration of wavelength/optical frequency measurement instruments – Part 3: Optical frequency meters usin

اختصاصی از فی ژوو IEC TS 62129-3:2014-Calibration of wavelength/optical frequency measurement instruments – Part 3: Optical frequency meters using optical frequency combs دانلود با لینک مستقیم و پر سرعت .

IEC TS 62129-3:2014-Calibration of wavelength/optical frequency measurement instruments – Part 3: Optical frequency meters using optical frequency combs