| 摘要 |
A low friction fabric sleeve is wrapped with cords on a long threaded mandrel. The assembly is heated to preset the fabric. A tubular body of resin and glass filament reinforcing is formed over the sleeve and when completed and unscrewed from the mandrel, is cut to the lengths of the desired nuts or internally threaded parts. The tips of the screw threads may include the cords which were wound under tension to form the sleeve on the mandrel.
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