Index of /w/images/thumb/2/2f/Double-Pipe_Heat_Exchanger.png

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 300px-Double-Pipe_He..>2025-06-04 14:12 18K 
 180px-Double-Pipe_He..>2025-07-10 11:48 9.7K 
 150px-Double-Pipe_He..>2025-09-02 02:39 7.9K 
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