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vacuum tube solar collectorFeature:1.Glass vacuum tube solar collector,Website:http://www.sidite-energy.com, high temperature,antifreeze,vacuum insulation.2.Food-grade stainless-steel SUS304 2B inner tank,full-automatic welding technology,underthe protection of magnesium rod,it can increase of service life.3.High pressure polyurethane foaming insulation,as the prefect density and4.the thermal conductivity coefficient is small, so it can provide effective heat preservation5.It can supply for several outlets at the same time, so it can fit for various requirement.6.Non-pressure operation, can be