50200000 Repair, maintenance and associated services related to aircraft, railways, roads and marine equipment Repair and maintenance services
50200000 Gwasanaethau atgyweirio, cynnal a chadw a gwasanaethau cysylltiedig mewn perthynas ag awyrennau, rheilffyrdd, ffyrdd a chyfarpar morol Gwasanaethau atgyweirio a chynnal a chadw