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New Concept 300L Pressurized Compact Solar Hot Water Heater with D137mm Super Vacuum Tubes 90% Heat Utilization, Find Details and Price about Solar Water Heater Pressurized Solar Water Heater from New Concept 300L Pressurized Compact Solar Hot Water Heater with D137mm Super Vacuum Tubes 90% Heat Utilization - Shandong Longpu Solar Energy Co., Ltd