超声扫描仪有着广泛的运用，从胎儿检查到检测飞行器构造中的缝隙。
ULTRASOUND scanners are used for tasks as diverse as examining unborn babies and searching for cracks in the fabric of aircraft.
本文提出利用微机技术构造一种在线实时监视和测量电网、电源客观存在的谐波电压和浪涌电压的智能测试仪。
This paper presents an intelligence test set built by microcomputer technics to monitor and measure the harmonic and surge voltages in the power network and source, on-line and with a real time.
本文介绍用电路构造智能式精密数字电阻仪的原理及技术途径。
This paper presents the principle and design method of a precision digital resistor constructed by a circuit.
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