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11月中旬，邮电部眉山通信设备厂研制开发的开关电源，通过了由四川省邮电管理局、建设工程局和器材总公司，云南省邮电管理局，四川省产品质量监督检验所，四川联合大学，眉山地区邮电局和乐山市邮电局等单位组成的专家组的鉴定。经专家组对DUTI型48／100～500开关整流模块的
In mid-November, the Ministry of Posts and Telecommunications Meishan communications equipment factory research and development of switching power supply, passed by the Sichuan Provincial Posts and Telecommunications Administration, Construction Engineering Bureau and Equipment Corporation, Yunnan Provincial Posts and Telecommunications Administration, Sichuan Provincial Institute of product quality supervision, Sichuan United University , Meishan District Post Office and Leshan City Post Office and other units composed of experts identified. The group of DUTI 48/100 ~ 500 switching rectifier module