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3. Waterproof watch casing pressure: it's case on the shell casing pressure
on the bottom cover. The watch case back cover of the body is special: the tube is surrounded by a high wall, the movement mounted on the tube wall inside the back cover, table cover glass mounted directly above the rear trunk, into the future on the shell casing pressure , table glass and back cover to be tightly trap, which play the role of water-proof seal. Article shafts on which two sections connected by the upper and lower, switch cover, the first article on the Removal section on the handle bar on the head and stem, with special rolling on and rolling with a press tight. No special roll with the fingers can be pressed to push.
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