pneumatic (air): pneumatic tools- air hammers, grinders, etc. hydraulic system (liquid): bucket actuators on a front loader or on a bulldozer. Other examples in the automotive industry: pneumatic-...
Hydraulic and Pneumatic systems are similar in that they both use double/single acting cylinders to operate something - Be it an automatic door for pneumatics and other such trivial tasks, or JCBs...
the main difference between hydraulic and pneumatic system is that hydraulics uses fluid to power their system and pneumatic uses air (in that case air is not a fluid) All matter is made up with all...
Elements of both but the molten rock pyroclastic flows (Mauna Kea , Hawaii) are hydraulic, the Mt. St Helens eruption was to a large extent pneumatic as the water turned to steam.