2013年10月8日星期二

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Best-seller North Face Mens Down Jacket Grey clearance saleThe scuba diving initially began without any equipment it involves in the present day. In earlier times, the people had to catch their own food, so they dove deep into the water, devising ways to catch underwater creatures to eat. Snorkeling evolved here, which used a mask and a tube to breathe. In the 1770s, Doctor Freminet attempted to make a breathing apparatus that would allow for underwater breathing. He thought that his breathing device was perfectly made but, he died for a lack of oxygen while trying to use it. Then, in the 1880s Henry Fleuss created another breathing apparatus for underwater. He dove 30 feet underwater but, died from too much of oxygen. Finally, Benoit Rouguayrol and Auguste Denayrouse decided to create a functioning regulator that consists of a compressed air tank worn on the back and connected to a mouthpiece. Even if the divers cannot move freely, Clearance North Face Women Denali Hooded Jacket Black sale it was really an outline for models to come later. Technology improved, and the first SCUBA (Self-Contained Underwater Breathing Apparatus) tank was formed throughout World War II. It was used by the US Navy's frogmen and gave them the essential freedom to move about underwater without being associated above the surface.

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