Plastic substances, semi-processed; plastic fibers, other than for textile use; threads of plastic materials, other than for textile use; carbon fibers, other than for textile use; synthetic resins, semi-processed; insulating materials; fiberglass for insulation; synthetic resins

Mobile boarding stairs, not of metal, for passengers; valves, not of metal, other than parts of machines; containers, not of metal [storage, transport]; steps [ladders], not of metal; work benches; stair rods; removable mats or covers for sinks

Material testing; technical research; conducting technical project studies; engineering drawing; quality checking and testing