More clues of the H.L. Hunley mystery are being revealed during conservation of the American Civil War submarine.
원문출처 : http://www.cnn.com/2017/06/08/travel/civil-war-submarine-hunley-crew-compartment/index.html
원문출처 : http://www.cnn.com/2017/06/08/travel/civil-war-submarine-hunley-crew-compartment/index.html