The punch density of a needle-punched nonwoven fabric is 50 punches/cm2

The punch density of a needle-punched nonwoven fabric is 50 punches/cm2

Q. The punch density of a needle-punched nonwoven fabric is 50 punches/cm2. If the stroke frequency of needle bed is doubled and the fabric delivery speed is halved, then the punch density (punches/cm2) would be

(A) 25(B) 50(C) 100(D) 200
Ans: 200
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