409 / | HD | GEAR CUTTING, MILLING, OR PLANING |
288 | DF | PLANING {14} |
289 | DF | .~ With regulation of operation by templet, card, or other replaceable information supply {2} |
290 | .~.~ Including use of tracer adapted to trigger electrical or fluid energy {1} | |
291 | DF | .~.~.~> Including provision for circumferential relative movement of cutter and work |