... light weight Validity:15 years Air Breathing Apparatus (SCBA)1. Features Air Breathing Apparatus/Self-contained breathing apparatus is easy to operate, can ... and oxygen deficiency hazardous atmosphere. It is accordance with the standard GA124-2004. 2. Specifications a.structure b. ... , laboratory, mine, pertroleum, facorty and metallurgy. a. the atmosphere that is polluted by smoke, poisonous gas or/and ...