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China plastic bag manufacturers.Qu (2), Ma (ramie, flax, jute) fiber: a cross-sectional shape: round or polygonal waist with the cavity; vertical surface morphology: there are cross sections, vertical stripes (3), wool fibers: cross sectional shape: round or nearly round, some hairy pith; vertical surface morphology: surface scales (4), angora fiber: a cross-sectional shape: dumbbell-shaped, hairy pith; vertical surface morphology: surface scales. (5), silk fibers: cross-sectional shape: irregular triangle; vertical surface morphology: smooth and straight, vertical streaks (6), ordinary viscose fiber: a cross-sectional shape: sawtooth-shaped, skin-core structure; vertical surface morphology : longitudinal grooves (7), strong fibers: cross-sectional shape: less tooth, or circular, oval; vertical surface morphology: smooth surface (8), acetate fibers: cross-sectional shape: clover. irregularly shaped or zigzag; vertical surface morphology: surface with longitudinal stripes (9), acrylic fiber: a cross-sectional shape: round, dumbbell-shaped or lobed; vertical surface morphology: surface smooth
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