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اختصاصی از فایل هلپ IEC 62271-105:2002- High Voltage Switchgear and Controlgear-Switch Fuse Combination دانلود با لینک مستقیم و پر سرعت .

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اختصاصی از فایل هلپ IEC 61190:2014-Attachment materials for electronic assembly – Part 1-2: Requirements for soldering pastes for high-quality interconnects in electronics assembly دانلود با لینک مستقیم و پر سرعت .

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اختصاصی از فایل هلپ BS EN 61291:2012-Optical amplifiers Part 1: Generic specification دانلود با لینک مستقیم و پر سرعت .

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اختصاصی از فایل هلپ IEC 62715-6-1:2014-Flexible display devices – Part 6-1: Mechanical stress test methods دانلود با لینک مستقیم و پر سرعت .

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اختصاصی از فایل هلپ 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