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近期,经中国煤矿机械工程装备(集团)公司组织的新产品技术鉴定,张家口煤矿机械厂研制的QJZ-2×400/1140S型矿用真空电磁启动器通过国
Recently, the China Coal Mine Mechanical Engineering Equipment (Group) Company organized the identification of new products, Zhangjiakou Coal Mine Machinery Factory developed QJZ-2 × 400 / 1140S mining vacuum electromagnetic starter through the country