The ballonet inside the survivalpack can be aerated and placed into the bag to postpone the sink time of the survivalpack, so as to help a drowned person catch the survivalpack.
救 生包内小气球使用时，吹大来放入袋子中，可延缓救生包下沉的时间，以利 于溺水者抓住；
2
A farmer and his family must fight for survival after a ferocious pack of wild dogs infiltrates their isolated farmhouse.