Circular welding
Wood impregnation
http://en.wikipedia.org/wiki/Quenching
Thermal treatment for metals
http://en.wikipedia.org/wiki/Reducer
Mechanism for guiding
Kinetotherapy
Shock absorber
Cars and electromagnetism
Robotic arm collision prevention system
Safety clutch
Solar panel array
Plywood
Car steering
Thermal insulation
Solar-thermal conversion
Steering mechanism
Determining the wear resistance of material
