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المؤلفون: Horst Bettin, Barry Wood
مصطلحات موضوعية: Physics, Kilogram, General Physics and Astronomy, Planck constant, 01 natural sciences, X-ray crstal density method, 010309 optics, revised SI, symbols.namesake, kilogram, Quantum mechanics, 0103 physical sciences, symbols, 010306 general physics, Realization (systems), Kibble balance