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At the end of the 19th century the Japanese government built several military forts on the sea or artificial islands inside Tokyo bay in order to defend its capital from foreign sea powers. Three outer forts or Kai-hou, which were between the cape of…

As the most important qualities of ancient Chinese sailing junks, the square bows and sterns with transverse watertight bulkhead and the lugsails with bamboo mat and strip remained the same over thousands of years. Of which, the traditional Fujian…