1943 By Editor Posted April 12, 2019 In 19432019-04-122019-04-12https://demaco.com/update/wp-content/uploads/2019/04/demaco-logo.pngDemacohttps://demaco.com/update/wp-content/uploads/2019/04/1943-first-grooved-cylinder_12209643345_l-2.jpg200px200px 0 Joseph De Francisci invents both the knurled and grooved extruder barrel. Editor
