Epoxy resins, unprocessed; Epoxy resins; Thermally curable unprocessed synthetic resins; Acrylic resins, unprocessed; Synthetic resin plastics [unprocessed]; Raw [unprocessed] artificial resins; Unprocessed polymethyl methacrylate resins; Unprocessed synthetic resins of silicate; Unprocessed synthetic resins of methacrylate.

Coating of drains; Services for the repair of canals; Cleaning of drains; Repair of canalization systems; Maintenance and repair of pipeline systems; Services for the repair of pipelines; Pipeline installation and repair; Maintenance and repair of pipelines.

Engineering research; Engineering design; Engineering services; Engineering and computer-aided engineering services; Engineering project management services; Technological engineering analysis; Provision of engineering reports; Engineering consultancy services; Surveying [engineering]; Conducting engineering surveys; Engineering services for others; Technical engineering; Engineering design and consultancy; Advisory services relating to design engineering; Engineering services in the field of environmental technology; Engineering services in the field of building technology; Research in the field of science provided by engineers; Research in the field of technology provided by engineers; Engineering drawing; Engineering testing; Engineering consultancy relating to testing; Engineering consultancy relating to design.