a. c .balance indicator,交流平衡指示器

    a. c. bridge,交流电桥

    a. c. current calibrator,交流电流校准器

    a. c. current distortion,交流电流失真

    a. c. induced polarization instrument,交流激电仪

    a. c. potentiometer,交流电位差计

    a. c. resistance box,交流电阻箱

    a. c. standard resistor,交流标准电阻器

    a. c. voltage distortion,交流电压校准器

    a. c. voltage distortion,交流电压失真

    Abbe comparator,阿贝比较仪

    aberration,像差

    ability of anti prereduced component,抗先还原物质能力

    ablative thickness transducer [sensor],烧蚀厚度传感器

    abrasion testing machine,磨损试验机

    absolute calibration,绝对法校准