42-Civil engineering

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42130 - Construction of bridges and tunnels (116 companies)
42220 - Construction of utility projects for electricity and telecommunications (230 companies)
42120 - Construction of railways and underground railways (302 companies)
42110 - Construction of roads and motorways (945 companies)
42210 - Construction of utility projects for fluids (537 companies)
42910 - Construction of water projects (408 companies)
42990 - Construction of other civil engineering projects not elsewhere classified (8138 companies)