ANECHOIC CHAMBER - NARA - 17470549.jpg
en
ANECHOIC CHAMBER NARA 17470549, Anechoic chambers, US National Archives series: Photographs Relating to Agency Activities, Facilities and Personnel, Images from the National Archives and Records Administration, US National Archives location: other, ANECHOIC CHAMBER
commons
ja
ANECHOIC CHAMBER NARA 17470549、アネコ部屋、米国国立公文書館所蔵:活動・施設・人事関係の写真、米国国立公文書館所蔵:その他、アネコ部屋
commons_translated
anechoic chamber anechoic many-chambered