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Nowadays life buoy adopts solid foam material providing reliable and stable buoyancy. Due to its decompression, it takes up the storage space greatly. When the disaster occurs, insufficient life buoys tend to arouse huge tragedy .The life buoy is divided into 8 equal module, between which rotatable high-strength connections are set. It can be stretched to be straight by rotating in store so that the same space would store double life buoys. At one end of the life buoy is a buckle made of high strength engineering plastic.
Xiaowei Wu，Caixiang Ding，Rufeng Dai，Ziyun Yan，Dunqi Lu，Wenjie Zhang，Dawei Pan，Huanghao Jin，Qionglei Zhu