EXPERIMENTAL PYROLYTIC GRAPHITE MULTISTAGE DEPRESSED ELECTRON TUBE COLLECTOR - NARA - 17496171.jpg
en
EXPERIMENTAL PYROLYTIC GRAPHITE MULTISTAGE DEPRESSED ELECTRON TUBE COLLECTOR NARA 17496171, 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, EXPERIMENTAL PYROLYTIC GRAPHITE MULTISTAGE DEPRESSED ELECTRON TUBE COLLECTOR
commons
ja
国立公文書館所蔵画像:国立公文書館所蔵画像他、外部資料
commons_translated
multistage pyrolytic collector graphite plumbago slip ring thermionic current thermionic reflectorize swivel free electron depressed