Extrusion Converts a billet of steel into a length of uniform cross portion by forcing the billet to flow through the orifice of the die. All over 6000 B.C.E., human civilization took big leaps forward in working with metals. We learned to choose metals from rocks and form them into https://fredn655brh2.wikikali.com/829237/the_smart_trick_of_metallurgical_processes_that_no_one_is_discussing