Dysonのインスタグラム(dyson) - 10月24日 23時47分

Here at #Dyson we have 5 semi-anechoic chambers which all products are tested in for sound levels. The walls and ceilings are non-echoic so they produce accurate sound measurements. #BTS in #RDD #Engineering

[BIHAKUEN]UVシールド(UVShield)

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