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Exclusive interference coating process is applied to the Three-high “Sun Core" tube--- vacuum tube of high- temperature and special-efficiency. For its high collecting efficiency, the quantity of heat is increased more than 12%, which makes the hot water... More
Exclusive interference coating process is applied to the Three-high “Sun Core" tube--- vacuum tube of high- temperature. Coating of the product has better stability, Absorptance up to 0.96, Emission ratio down to 0.044 and heat gain increased more than... More
