CATHODE TUBE - NARA - 17420001.jpg
en
CATHODE TUBE NARA 17420001, 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, CATHODE TUBE
commons
ja
CATHODE TUBE NARA 17420001、米国国立公文書館シリーズ:活動・施設・職員関係の写真、米国国立公文書館所蔵画像:その他、CATHODE TUBE
commons_translated
cathode cathodic