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Figure 1. Stress ()-strain(E) graph for materials A,B and C. (c) A neat exchanger contains pressurised water at 0.5MPa and is usexide. of varying the temperature up to 80C. The internal exchanger have an internal fall by plastic fot fipes of the heat 2mm. The pipes for the internal pipes. The suitable material for the provide the best rate three ste cheap as possiblerial, you must present all