Assertion: cathode ray tube's electron gun | /r/HasProperty | classified by emission mechanism
Facets:
value: by the number of electrodes
type: OTHER
value: by focusing (pure electrostatic
type: MANNER
Source sentences:
text: Electron guns may be classified by the type of electric field generation (DC or RF), by emission mechanism (thermionic, photocathode, cold emission, plasmas source), by focusing (pure electrostatic or with magnetic fields), or by the number of electrodes.