| http://www.w3.org/ns/prov#value | - late-fin exchanger. [0066] The procedure to apply the invention to other types of fins (i.e., other than a perforated fin) would require similar steps but the exact sequence of the operations may be different, as persons skilled in the art will recognize. [0067] The surface textures shown in FIGS. 3A, 3B and 3C may consist of grooves or fluting 52 which are nearly sinusoidal in a sectional view, a
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