短语词组短语life -buoy detail 救生圈night life -buoy 带烟火信号的救生圈plastic life -buoy test 塑料救生浮具试验Life buoy self -igniting light marker 救生圈自亮灯life buoy self -lighiting light 救生圈自亮灯life buoy with self -igniting light 自燃光救生圈 返回 life-buoy