
A gun turret is a weapon mount that protects the crew or mechanism of a projectile-firing weapon and at the same time lets the weapon be aimed and fired in many directions. The turret is also a rotating weapon platform. This platform can be mounted on a fortified building or structure such as an anti-naval land battery, or on a combat vehicle, a n...
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http://en.wikipedia.org/wiki/Gun_turret

(from the article `military aircraft`) ...Flying Fortress. This famous plane was based on the concept that a bomber could penetrate to any target in daylight as long as it had sufficient ...
Found on
http://www.britannica.com/eb/a-z/g/82
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