The Democratic People's Republic of Korea, usually known as North Korea, is a state that occupies the northern half of the Korean peninsula. North Korea is a new state, founded in 1948 as a result of the postcolonial settlement handed down by the United States and the Soviet Union (USSR).
Curtain wall may refer to: 1  Curtain wall (architecture), the outer skin of a modern building. 2  Curtain wall (fortification), the outer wall of a castle or defensive wall between two bastions. 3  Curtain wall (construction), dust barriers for construction.
Curtain grouting is the construction of a curtain or barrier of grout by drilling and grouting a linear sequence of holes. Its purpose is to reduce permeability. It may cross a valley as a vertical or an inclined seepage cut-off under a dam; it may be circular around a shaft or other deep excavation; or it may be nearly horizontal to form an umbrella of grout over an underground installation.