In the third section, three methods of filament division are presented: linearity division pillar division, helix division.
在第三节中提出了灯丝的三种分割方法：线形分割、柱形分割、螺旋模型模拟灯丝。
The structure and properties of flat section and circular polyester filament were studied through measuring birefringence, sonic modulus and work coefficient ect.
对扁平形聚酯纤维和圆形聚酯纤维的结构和性能进行了研究。
3 denier per filament uncrimped polyester staple, bright in luster, and with a round cross-section.
涤纶无卷曲超短纤维，单丝纤度0.3分特，有光，圆形截面。
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