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personal flotation devices
oil 个人水中救生用具
textile 个体漂浮装置 (PFDS)
personal flotation device ['pɜ:s(ə)nelfləu'teɪʃ(ə)ndɪ'vaɪs]
nautic., tech. 个人漂浮装置
tech. 人员漂浮设备