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el circuito aéreo y la seguridad9
produce lo que llamamos historia
el rechazo que pensaba que obtendría por parte del señor Aguirre no es otra cosa que una atracción irresistible contra la que ninguno es capaz de luchar
las aplicaciones de la ergonomía
Alejandro González García)
Marine Mammals and Low-Frequency Sound Ramiro De Maeztu el circuito aéreo y laMarine Mammals and Low Frequency Sound Sound has become a major tool for studying the ocean. Although the ocean is relatively opaque to light, it is relatively transparent to sound. Sound having frequencies below 1,000 Hertz (Hz) is often defined as low frequency sound. The speed of sound is proportional to the temperature of the water through which it passes. Therefore, sound speed can be used to infer the average temperature of the water volume
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