http://en.wikipedia.org/wiki/Hydraulic_motor
http://en.wikipedia.org/wiki/Amplified_piezoelectric_actuator
Eg http://en.wikipedia.org/wiki/Conventional_landing_gear
http://en.wikipedia.org/wiki/Composite_material
Machine
Separating metal from the soil
Lighting set
Manufacturing
Acoustic mechanical device
Conversion
http://en.wikipedia.org/wiki/Sintering
http://en.wikipedia.org/wiki/Reluctance_motor
bipolar current version
http://en.wikipedia.org/wiki/Smart_transducer
Environmental friendly solution
http://en.wikipedia.org/wiki/Benzimidazole
http://en.wikipedia.org/wiki/Phase-locked_loop
For geophysical surveying or medical diagnostic purposes
http://en.wikipedia.org/wiki/Electrical_discharge_machining
