83 / | HD | CUTTING |
788 | DF | BY ENDLESS BAND OR CHAIN KNIFE {10} |
814 | DF | .~ With means to guard the tension {2} |
816 | DF | .~.~ With means to vary distance between pulley or sprocket axes {2} |
818 | DF | .~.~.~ Including means to yieldably bias pulley {1} |
819 | .~.~.~.~ By fluid means |