N.A.T.O. The defensive military alliance formed in 1949 by ten european countries. WARSAW PACT A military alliance formed in 1955 by the Soviet Union Netherlands. Norway.
Tank Rings. Tank rings filled with gravel lift the tank above the surrounding grade. This keeps the tank out of standing water and increases the life of the tank bottom.
An esophageal ring, or Schatzki ring, is a ring of tissue near the end of the food pipe (esophagus) just above the opening to the stomach.The area with the ring is narrower than the rest of the food pipe.any people have a Schatzki ring and do not know it, because most of the time a Schatzki rings causes no symptoms. Symptoms may occur when poorly chewed food gets caught at the ring before reaching the stomach. A Schatzki ring can cause chest pain or a feeling that the food is stuck and wonât move into the stomach.