by tongs or grippers

Full Title

Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills (guiding, conveying, or accumulating easily-flexible work in loops or curves B21B41/00; specially associated with cooling-beds B21B43/00; conveying or transporting in general B65G) > Revolving, turning-over, or like manipulation of work, (guides in which work is subjected to permanent internal twisting B21B15/02) > by tongs or grippers