短語(yǔ)詞組短語(yǔ)cathode e spot 陰極斑點(diǎn)cathode ray spot 陰極輝光vacuum arc cathode spot 真空電弧陰極斑點(diǎn)cathode -ray E tube spot scanner 陰極射線管光點(diǎn)掃描器 返回 cathode spot