[电子] 逻辑电压电平 logical level: 逻辑1电平; 逻辑层次; 逻辑级logical one voltage: 逻辑1电压logical threshold voltage: 逻辑临界电压logical zero voltage: 逻辑零电压voltage level: 电压电平; 电压级下载手机词典可随时随地查词查翻译