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１９９４年第４季度程控用户交换机产品国家监督抽查合格企业（国家电话交换机质量监督检验中心供稿）1994年第4季度程控用户交换机产品国家监督抽查合格企业...
Q4, 1994 Program-controlled user switch products national supervision spot check of qualified enterprises (National Telephone Switch Quality Supervision and Inspection Center for contributions) Q4, 1994 Program-controlled user switch products national supervision spot checks qualified enterprises ...