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![PDF] Numerical analysis of a modified evacuated tubes solar collector | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/82b1a3b7a891e1a521dafa531244ce39b379d4b7/2-Figure1-1.png "PDF] Numerical analysis of a modified evacuated tubes solar collector | Semantic Scholar")
PDF] Numerical analysis of a modified evacuated tubes solar collector | Semantic Scholar
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