Exhaust-Only Ventilation Exhaust-only ventilation is the reverse of supply-only ventilation; stale air leaves the building from a known location (through exhaust fans ducted to the outdoors) and outdoor air enters the building from an unknown location.
In the 1960s, the Soviet Union began to prepare the Warsaw Pact for its internal function of keeping the NSWP member states within the alliance. The Soviet Union took a series of steps to transform the Warsaw Pact into its intra-alliance intervention force.
The Warsaw Pact was an organization of communist states in Central and Eastern Europe. It was established on May 14, 1955 in Warsaw, Poland. The treaty was signed in Warsaw on May 14, 1955 and official copies were made in Russian, Polish, Czech and German. It was an initiative of the Soviet Union.