бетон боомт
Бетон хийцтэй боомт.
Эх сурвалж:By the structural features, concrete dams are termed as gravity (massive), buttress, and arch. A gravity dam is a concrete structure resisting the imposed actions by its weight and section without relying on arch.
Source S.-H. Chen, Hydraulic Structures Wuhan, 2015 p.2