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Phreatic water little secret
From;    Author:Stand originally

Do good neutral buoyancy adjustment, body is loosened, the movement is elegant, can reduce redundant motion to use up air; Breath is gently, can make every air produces effect and not wasteful; Use frog shoe correctly, can decrease to want the air that use up because of force of counteractive water resistance; Smoke of Buddhist monastic discipline, need more air because of the lung of the person that smoke; Avoid temperature too low, avoid to need a large number of air to maintain temperature thereby.