stair-treads of metal; stair treads of metal; stair treads [steps] of metal; stair-treads [steps] of metal; ducts of metal for ventilating and air conditioning installations; metal ducts for ventilating and air-conditioning installations; metal vent covers

safety, security, protection and signalling devices; safety, security, protection and signalling apparatus; safety and security apparatus and instruments; traffic cones; highway safety cones; reflectors for traffic signals; signalling apparatus and instruments for traffic use; road signs, luminous or mechanical; luminous or mechanical road signs; luminous or mechanical traffic signs; luminous or mechanical signs for traffic use; traffic signs, luminous or mechanical; traffic guidance apparatus [luminous sign]; warning signs [luminous]; luminous warning signs; safety signs [luminous]; warning flags; safety signals, luminous or mechanical; illuminated signs; mechanical or luminous signs; warning triangles to indicate vehicle breakdowns; luminous traffic signs; luminous road signs; vehicle breakdown warning triangles