57 / | HD | TEXTILES: SPINNING, TWISTING, AND TWINING |
1 R | DF | APPARATUS AND PROCESSES {45} |
332 | DF | .~ False twist device {4} |
334 | DF | .~.~ Friction type {4} |
337 | DF | .~.~.~ Having a frictional disc {1} |
338 | .~.~.~.~ On plural axes {1} | |
339 | DF | .~.~.~.~.~> With discs overlapping {1} |