essay on a trip on a submarine
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Submarine is water raft capable of independent operation underwater it differs from submersible, which has more limited underwater capacity ..
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Submarines had been built
before ,submarine design took ,off during the 19th century and the were adopted by serveral navis ...................
most of large submarines consist of cylindrical body with hemisphere ends and vertical structure usually conculed amidships, submarines have one of the wildest ranges of types and capabilities of any vessel ..........They rang from small autonomous ..........
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