吉林电务段,过去测试继电器的缓吸与缓放时间,是利用机械式电秒表,这种表测试时操纵麻烦,由于机械零件容易磨损往往造成测试误差,直接影响继电器维修质量。成为该段生产关键之一。在批林批孔运动的推动下,该段广大革命职工,针对这一生产关键,大胆创造,把集成电路计数单元应用到继电器测试台,试制成功 Jilin Electrical Services Section, the past test relay slow absorption and relaxation time, is the use of mechanical electric stopwatch, this table test trouble-handling, due to mechanical parts are often easy to wear and tear test errors caused by a direct impact on the quality of relay repair. Become one of the key production segments. Pledged in Lin approved Kong campaign, the majority of revolutionary workers, the key to this production, bold creation, the application of the integrated circuit counting unit to the relay test bench, trial success