Method of coupling a waterproofing geosynthetic material (WGSM) in a watertight diaphragm during a long construction interruption PJSC RusHydro Development of new designs for soil hydro-power structures using modern geo-technical materials Method of a zigzag watertight diaphragm made of bentonitic mats (clay liners) with intermediate seams PJSC RusHydro Development of new designs for soil hydro-power structures using modern geo-technical materials Device to control the air gap of the electrical machine.