电缆故障测试仪
Inspecting instrument for cable acci-dent
数字-数字数据变换器
digital-to-digital data converter
电缆故障测距
cable fault distance test
电力电缆故障测距综述
overview of power cable fault location
Survey of power cable fault location
万能电缆测试电桥
universal cable measuring bridge
参数测试仪
Parameter testing instrument
parameter instrument
测试数字逻辑电路
testing digital logic circuits
超声回波脉冲数字式测厚仪
ultrasonic echo-impulse digital thickness meter