Plastic material is extruded through very small holes to form fibres.
塑料从细孔中挤压出来形成纤维。
Four, steel structure material: polystyrene, extruded board, polyurethane board, glass cotton lap. Felt.
钢构材料：聚苯乙烯、挤塑板、聚氨酯板，玻璃棉卷毡等。
Four, steel structure material: polystyrene, extruded board, polyurethane board, glass cotton lap. Felt.
钢构材料：聚苯乙烯、挤塑板、聚氨酯板，玻璃棉卷毡等。
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