Train
The forge-train consists of two pairs of rolls connected in one line, those on the left being the roughing or puddle rolls; the right are the finishing-rolls. The mill-train also consists of two pairs of rolls--roughing or billeting rolls, and finishing-rolls. Forge-train puddle-rolls receive the puddle-blooms from the squeezer; the mill-train billeting-rolls are for rolling merchant-iron from the puddled bar after being cut, piled, and reheated.