E04C 3/20

Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; {Braces} of concrete or other stone-like material, e.g. with reinforcements or tensioning members

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data.epo.org/linked-data/def/cpc/E04C3-20

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E04C 3/02

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