Changes

Air pressure is used by modern industry, in the form of pneumatic controls. Hydraulic controls are similar to pneumatic ones, but use fluid pressure instead of air pressure, and are more precise due to the less compressible quality of the fluids used.  

Air pressure is used by modern industry, in the form of pneumatic controls. Hydraulic controls are similar to pneumatic ones, but use fluid pressure instead of air pressure, and are more precise due to the less compressible quality of the fluids used.  

[[Category:Science]]

[[Category:Physics]]

[[Category:Meteorology]]

[[Category:Meteorology]]