Self-contained breathing apparatus is used to ______.A.make underwater repairs to bargesB.determine if the air in a tank is safe for menC.enter areas that may contain dangerous fumes or lack oxygenD.resuscitate an unconscious person
Self-contained breathing apparatus is used to ______.
A.make underwater repairs to barges
B.determine if the air in a tank is safe for men
C.enter areas that may contain dangerous fumes or lack oxygen
D.resuscitate an unconscious person
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