1.

IN_A_SHAPING_OPERATION,_THE_AVERAGE_CUTTING_SPEED_IS_(_STROKE_LENGTH_S,_NUMBER_OF_STROKES_PER_MINUTE_N,_QUICK_RETURN_RATIO_R)?$

A. NSR
B. NSR/2
C. NS(1 + R)
D. NS(1 + R)/2
Answer» E.


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