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Table 2 Statistics of hairy gray value of Z-yarn samples under different implantation times

From: Study on the Distribution of Frictional Forces on Z-yarn Continuous Implanted Preforms and Their Applications

Serial number

I0

I1

I2

I3

I4

Number of implantation

5

10

15

20

25

Grayscale value

96.203

97.510

98.424

99.543

101.862