为了准确、迅速测定电缆的故障点,呼和浩特市无线电元件二厂于1974年2月开始试制电缆故障测试仪,同年9月初步制成一台样机。经现场测试并征求有关部门的意见,改进了设计;于1974年10月完成了试制 In order to accurately and quickly determine the cable fault point, Hohhot radio components plant in February 1974 trial production of cable fault tester, in September the same year initially made a prototype. After the field test and seek the opinions of relevant departments, the design was improved; the trial was completed in October 1974