... friendly 3) 15 years' lifetime 4) ISO9001:2000 solar heat pipe 1.The use of national patent technology that the connection ... with aluminium fan among heat pipe reduces the heat transfer system of thermal. resistance,and improves the ... 0.5mm &=1.6mm,dia.=58±0.5mm &=1.6mm, Pipe Length1500mm, 1600mm, 1700mm, 1800mm, 1900mm, 2000mmAbsorptive Coating PropertyStructureCu/ ...