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Dalian Petroleum Instrument Co. Ltd.was founded in 1988. It has been the leading automatic petroleum instruments manufacturer also the most famous professional manufacturer in China. In recent years we developed many excellent products: Automatic Distillation Tester, Automatic Pour Point Tester, Automatic Flash Point Tester, Automatic Micro Freezing Point Tester, and so on. They all reach or ahead of the international market place and also are perfect for product renewal.