[Class : 6] Prefabricated Building Elements Of Metal, In Particular Building Elements Of Metal For Overhead, Ground Or Underground Power Supply Installations For Vehicles, In Particular Means Of Transport Such As Railways And Trolleybuses And Trolleys; Building Elements Of Metal For Conductor Rails Or Catenaries; Metal Anchoring Devices For Personal Safety On Building Structures And Roofs.[Class : 9] Lightning Conductors; Railway Traffic Safety Apparatus; Reinforcements And Electrical Connection Elements For Conducting, Interrupting And Controlling Electrical Energy In Contact Lines, Including Trolley Lines; Grounding Devices For Railway Installations And Construction Machinery, In Particular Terminals For Grounding And Lightning Protection Installations, Construction Elements For Foundation Grounding Electrodes, Components For Potential Equalization, Depth Grounding Electrodes, Overvoltage Protection Apparatus, Arresting Bars, Magnetic Grounding Contacts And Grounding Bars.[Class : 37] Installation, Maintenance And Repair Of Lightning Protection Systems; Installation, Maintenance And Repair Of Railway Traffic Safety Apparatus; Installation, Maintenance And Repair Of Metal Anchoring Systems For Personal Safety.[Class : 42] Scientific And Technological Services; Engineering Services.