bj-xwj.com
北京显微镜供应,各类金相显微镜,生物显微镜,偏光显微镜,体视显微镜 - 上光北京代表处
上海光学仪器厂北京代表处,为北京区域用户提供显微镜产品:各类金相显微镜,生物显微镜,体视显微镜,偏光显微镜等,欢迎上门观察试机.
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