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.
What is the purpose of lantern ring? A lantern ring, in engineering, is a part of a stuffing box. It keeps in place the lubricating fibres of a shaft that penetrates a bulkhead.