Silenciadores para bajas frecuencias
Silenciador de Baja Frencuencia #Fivi . Silenciadores para bajas frecuencias. Sound attenuator for low frequency . Kits to be used in ventilation and air conditioning systems -Attenuation effect due to absorption. -Sound absorbing material faced with glass fibre as a protection. -Sound absorbing material is non-combustible, fire rating class A1
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