Usually refers to a variety of drawn metal wire mold, as well as pull the fiber drawing die. All the center of the drawing die has a certain shape of the hole, round, square, octagonal or other special shape. The metal is pulled through the die hole when the size becomes smaller, and even the shape changes. Pull the soft metal (such as gold and silver) when the steel mold is enough, the steel mold can have a number of different holes in the hole.
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