Sharing alternate / Sharing alternate

In various disasters, fires are most often one of the major disasters of the most widespread threat to public safety and social development. In thesmoke to escape, the body if inadequate protection, easy to smoke inhaled, cause fainting or suffocation, while the eyes will cause irritation of smoke, causing tingling and blinded. In life, fire is always a lifeguard die of suffocation, trapped alive. The reason is that lifeguards rescued personnel to oxygen, oxygen can only give a person can not simultaneously achieve supply two. Redesign, oxygen tubes in the center of the design of a device may provide two oxygen device port.