| 摘要 |
PURPOSE:To secure safety in case a person falls into the water by constituting a jumper capable of being inflated or deflated optionally with an extent of volume of air capable of floating the person in the water. CONSTITUTION:A life vest is constituted to be capable of inflated or deflated optionally with an extent of volume of air capable of floating a person in the water. It is so constituted that air can be filled into or taken out of the cloth of the life vest directly and optionally. The life vest is formed in a shape of a jumper and the function of the life vest can be utilized by simply wearing the jumper. |
