| http://www.w3.org/ns/prov#value | - The method of producing a die having a rectangular hole with shearing surfaces formed by a hard metal such as tungsten carbide, which comprises forming a channel into a base of a softer metal than said hard metal, forming an aperture into the floor of said channel, securing rectangular blocks of said hard metal in spaced relation onto a bar of a softer metal than said hard metal, grinding the conf
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