5. Fully open valve at end of hose and wait until oxygen stops flowing.

6. Turn up reducing valve on cart to 200 pounds and allow oxygen to

flow until it ceases. Turn up recharger valve to 300 pounds and

again wait for ship's containers and supply pressure to equalize.

Turn up recharger valve to 450 pounds and wait until oxygen flow

ceases entirely.

7. Check pressure gauges in ship to make sure that all register in the

neighborhood of 425 pounds.

Survival at Altitude for Heavy and Very Heavy Bomber Crews · 第 45 / 78 题