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Vessel cell of beech

Section of springwood spruce tracheid

Kraft pulp fibers of spruce

Section of summerwood fir fiber

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contour length

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Mass per unit length

1 m

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fines

Prescreen 0.15 mm

chives

Fiber suspension

Screen # 6

Screen # 12

Screen # 20

Screen # 40

R 6

R 12

R 20

R 40

D 6

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fiber cross

section

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hydrostatic pressure

glass plate

wire

fiber

flow

fiber

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