This article deals with foe process of spinning plied yarn by roving frame, the remaking of draftingassembly, and the twisting and winding mechanism by roving frame.
本文介绍了利用粗纱机纺制股线的工艺过程及粗纱机牵伸、加捻和卷绕机构的改造方法。
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At the end of the paper the formation and development of the drafting system are described on the example of the assembly drawing of a brake coupling.