CeMoCoHa

1) hydraulic: the science of pressure in fluids 2)pnumatic:the use of compressed air in a confined space 3) dentists chair,brakes of a transport, tractor,backhoe 4)air compressor,air drill,airgun,airsoft gun 5)hydraulic systems work by using pressure in oil or other fluids 6)pnumatic systems work by pumping into a confined space 7)one uses air and one uses oilmedia type="youtube" key="mgkyabWnZFw?feature=player_detailpage" height="360" width="640"

start video at 1:30 in [|pnumatics]