該產品是利用化學藥品反應產生氧氣的隔式循環呼吸保護器，可以防止吸入外界有毒有害氣體。 主要用于煤礦井下發生有毒有害氣體及缺氧時，為遇險人員逃生使用

This product is the use of chemical reaction to produce oxygen isolation type circular breathing protection, can prevent toxic gas inhalation. When coal mine the occurrence of toxic harmful gas and oxygen. As the distress personnel escape when using