rescue backpack / backpack

Flooding accident is one of the most frequently occurred mine disasters. It takes a long time for the rescue workers outside to go down for aiding, as a result that the lives of the miners may be threatened. The self-rescue package can be manually enabled after the flooding accident occurred. It will be quickly inflated to form an air cushion enabling miners to sit on, avoiding their drowning or being washed away. Several self-rescue packages can be joined up to form a rescue package group enabling the trapped miners to reach a relatively safe place, where self-rescue and external rescue are more conveniently available. The RO reverse osmosis