We need some way(s) to refill the Mars Rover's oxygen supply without opening the Hangar doors. Ideally, I would want to see two ways to do this:
(1) An oxygen outlet in the Hangar, maybe near the power outlets, to directly refill the Rover over time while it is parked.
(2) A rack in which Rover Oxygen Extension bottles can be filled, so that we can "hot-swap" our oxygen bottles, and drive around with a fresh set while the other is being refilled in our base - similar to how we can put Rover Power Extensions in the battery rack to have them recharged.
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