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日本一家机械厂的老板见次竹内最近发明了一种专门用于保护摩托车司机人身安全的新型救生衣。这种救生衣将摩托车司机及其座位用一根富有弹性的线相联接，这根线又连接着装在救生衣内的压缩气瓶。一旦这种线与座位断开，压缩气瓶就会立刻启动，迅速使救生衣内充满气体。当司机
The boss of a Japanese machinery factory sees Hirakata recently invented a new lifejacket specifically designed to protect the safety of motorcyclists. The lifejacket links the motorcycle driver and his seat with a flexible cord that connects to a compressed gas cylinder in a lifejacket. Once this line is disconnected from the seat, the compressed gas cylinder is activated immediately and the lifejacket is quickly filled with gas. When the driver