Elements constructed in the shape of a hollow panel, e.g. with channels

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Plate-like or laminated elements; Assemblies of plate-like or laminated elements (specially adapted for movement F28F5/00) > Elements constructed in the shape of a hollow panel, e.g. with channels

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• F28F 3/14 by separating portions of a pair of joined sheets to form channels, e.g. by inflation (manufacture thereof B23P)