"0"^^ . . . . "0"^^ . . . "03277149-n"^^ . . . . "electron gun"@en-us . "the electrode that is the source of electrons in a cathode-ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electromagnetic apparatus that focuses it"@en-us . . "102631938"@en-us . . "electron gun"^^ . "103277149"^^ . . "103158327"@en-us .