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High-Efficiency 7MW Back-Pressure Steam Turbine Generator Sets for Industrial Applications B7-4.9/0.7, Find Details and Price about Energy-Saving Steam Turbine High-Efficiency Steam Turbine from High-Efficiency 7MW Back-Pressure Steam Turbine Generator Sets for Industrial Applications B7-4.9/0.7 - Anhui Zhengyufeng Energy Saving Technology Co., Ltd.