| http://www.w3.org/ns/prov#value | - A screw extrusion machine for milling and then extruding stock such as rubber and synthetic thermoplastics, comprising a feed screw comprising a front portion, a rear portion of large diameter compared with that of said front portion and a taperedl intermediate portion between said front and rear portions, at least one of said portions being rotatable relative to an adjoiningportion of said feed s
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