41 Providing educational services, namely, providing classes, interactive online classes, seminars and workshops in the field of pipelines, water pipes, wastewater pipes, wastewater gravity sewers, wastewater pressure pipes, drinking water pipes, oil pipes, district heating pipes, gas pipes, protective pipes for cables and industrial pipelines; educational services, namely, providing training in the field of testing, servicing and maintaining pipelines, water pipes, wastewater pipes, wastewater gravity sewers, wastewater pressure pipes, drinking water pipes, oil pipes, district heating pipes, gas pipes, protective pipes for cables and industrial pipelines; arranging and conducting of professional seminars and professional symposiums focusing on pipelines, water pipes, wastewater pipes, wastewater gravity sewers, wastewater pressure pipes, drinking water pipes, oil pipes, district heating pipes, gas pipes, protective pipes for cables and industrial pipelines