Perfiles tubulares de acero, de pared gruesa, galvanizados, para blindaje de conducciones eléctricas. (Tubo "conduit").
RIGID STEEL CONDUIT, ZINC COATED FOR USE IN ELECTRICAL RACEWAY
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77.140.75 / Steel pipes and tubes for specific use
91.140.50 / Electricity supply systems
CTN 36 - Iron and steel
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