1858年，英国丝绸纺织生产中使用的纺纱机，绕线机，并纱机和捻丝机插图。
An illustration of spinning, winding, doubling and throwing machines used in silk textile production in England, 1858.
利用并捻法将性能各不相同的几种长丝纱组合起来，研究并捻捻度和超喂对异组分并捻丝强度和伸长的影响。
Several filaments with different properties are combined together by the methods of doubling and twisting. And the effects of twist and over feed on the filament's strength and elongation are studied.
用等直径钢丝组股时，为保证在捻股时不出现跳丝，中心钢丝的加大量应根据所捻制股结构的不同而不同；
Using equal diameter steel wires to strand, ensuring not to skip steel wire during stranding, thickened value of core steel wire is different with different structure of strands.
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