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Laboratory, optical and precision equipments (excl. glasses) Gravel Sand Construction, foundation and surface works for highways, roads Wells construction work Construction work Blocks Concrete Concrete work Laboratory, hygienic or pharmaceutical glassware Granules, chippings, stone powder, pebbles, gravel, broken and crushed stone, stone mixtures, sand-gr... Goods used in construction Architectural, construction, engineering and inspection services Gravel, sand, crushed stone and aggregates Hardwood

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