Original sentence: The mobility of the North Dakota suit can be attributed to its low operating pressure; while the North Dakota suit was field tested at a pressure of 1 psi differential, NASA's EMU suit operates at a pressure of , a pressure designed to supply approximately sea-level oxygen partial pressure for respiration (see discussion above)
Edited sentence: The mobility of the North Dakota suit can be attributed to its low operating pressure; while the North Dakota suit was field tested at a pressure of  differential, NASA's EMU suit operates at a pressure of , a pressure designed to supply approximately sea-level oxygen partial pressure for respiration (see discussion above)