twist tube
倍捻加捻管 double-twist twist tube
倍捻式加捻管 Duo-Doppel-Draht
回转式加捻管 revolving tube
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通过实验测得了加捻管的机械加捻撩效率，从而得出了影响纱线捻度和加捻效率的主要因素。
Experiments have been done to measure the mechanical efficiency of the tube twister and to determine the main reason affecting the yarn twist and the twisting efficiency.
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