yunnan PVC business company shanghai tenghang mechanical and electrical equipment co., ltd. 1 sales and service of metallographic series products, metallographic grinding and polishing machine, metallographic polishing machine, metallographic inlay machine, metallographic cutting machine, metallographic polishing cloth, metallographic polishing agent, diamond polishing fluid, metallographic sandpaper, metallographic pre-grinding machine, cold mounting resin, hot mounting resin, metallographic microscope, hardness tester, diamond grinding disc, and provide customers with technical consultation, special training, comprehensive solutions and other technical services. jiexing thanks you for your support and love, and gives new old customers provide suitable product prices. 30 yes