How does an oxygen canister on an airplane or a spacecraft work?

Data extended the thirty minutes to two hours with oxygen canisters from another ship.

Emphysema patients have come to the clinic wheeling their oxygen canisters.

Left him chained to a railing with an empty oxygen canister, which you never checked.

At least they needn't resort to face masks and the back-wrenching burden of oxygen canisters.

In February, an oxygen canister caught fire, filling the station with smoke.

But now, barely able to talk and breathing from an oxygen canister, he was being wheeled into a private room for a night of observation.

An oxygen canister weighing half that can provide about four days worth of oxygen.

Then I grabbed a new oxygen canister, screwed it onto my regulator, and headed down the mountain.

One of the men in the group ahead of us had just bought a walking stick and an oxygen canister.