Not to be used for fighing rire,entering oxygen defi-cient voids or tanks,or worn by fire fighters. 3 There is a pressure gauge on the cylinder to indicate the cylinder pressure .

• 不得用于救火、进入缺氧舱或液货舱，也不得供消防队员穿着使用。2.；紧急逃生呼吸装置的压缩气瓶上装有一个压力表。