Definition that contains air passage
- breather air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
- snorkel air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
- schnorchel air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
- upcast air passage consisting of a ventilation shaft through which air leaves a mine
- schnorkel air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
- snorkel breather air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time