国家监督抽查用户交换机竟有一半不合格邮电部最近公布对用户电话交换机产品质量的首次国家监督抽查结果：目前，我国已有１００多个厂家按国家标准生产用户交换机，这次抽查是国家电话交换机质量监督检验中心受国家技术监督局委托而组织的，采取事先不打招呼的办法，依据... Half of the country’s supervisory and random checks on user exchanges failed. The Ministry of Posts and Telecommunications recently announced the results of the first national supervision and inspection on the quality of subscriber telephone exchanges. At present, there are more than 100 manufacturers in China that produce subscriber exchanges according to national standards. The spot check is a national telephone exchange. The Quality Supervision and Inspection Center is organized by the State Bureau of Technical Supervision, and it does not plan to say hello beforehand, based on...