Syurei-Mon (Syurei Gate, Syuri Castle) Naha. The name Okinawa means rope in the open sea, a fairly apt description of this long stretch of islands between the four main islands of Japan and Taiwan. Consisting of 49 inhabited islands and 111 uninhabited islands, Okinawa has a subtropical/tropical climate.
Aluminium is used for aircraft, trains, overhead power cables, saucepans and cooking foil. Titanium is used for fighter aircraft, artificial hip joints and pipes in nuclear power stations.
Pure aluminium is soft and weak, but it can form alloys with small amounts of copper, magnesium, manganese, silicon, and other elements to make alloys having a variety of useful properties. These alloys form vital components of aircraft and rockets. When aluminium is evaporated in a vacuum it forms a coating that reflects both visible light and radiant heat. These coatings form a thin layer of protective aluminium oxide that does not deteriorate as silver coatings do.