Steel, cast iron, copper, aluminium etc
Brass and bronze
Hard surfacing materials such as stellite
All of these
Tempering
Annealing
Normalising
Spheroidising
Kelvin
Joule
Clausis
Gay-Lussac
At the same speed and in the same direction
At the same speed but in opposite direction
At different speeds and in the same direction
At different speeds in the opposite direction
A two high rolling mill consists of two rolls which rotate At the same speed but in opposite direction.
Sub-sonic flow
Sonic flow
Super-sonic flow
Hyper-sonic flow