The cutter bar of a tractor operated mower ordinarily makes:
A. 800-1200 strokes/min
B. 1600-2000 strokes/min
C. 2400-2800 strokes/min
D. 3200-3600 strokes/min
A. 800-1200 strokes/min
B. 1600-2000 strokes/min
C. 2400-2800 strokes/min
D. 3200-3600 strokes/min