| 摘要 |
PROBLEM TO BE SOLVED: To provide a wristwatch by which the consumption limit time of an air-breathing cylinder is securely confirmed by visual recognition. SOLUTION: A rotary bezel 5 rotatably attach on an outer body 2 of the main body of the wristwatch 1 is provided with a graduation indication dial 6 for calculating the amount of air consumption for each individual and calculating the consumption limit time 9 of the air-breathing cylinder on the basis of the calculated amount of air consumption. COPYRIGHT: (C)2009,JPO&INPIT
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