What does TWR stand for?

Tower

Consist of sets of mounted rolls. The top rolls are in a fixed position but the bottom rolls are mounted on a moveable carriage. The carriage is controlled by cables that can move the carriage up or down in the tower. When the carriage is lowered extra strip is stored in the tower. This strip is used when a weld is being made. Tower for loops of steel (#5 Galvanize); allows entry end to shut down without stopping production; also a tower at which allows the coating to freeze on the steel.