By analysing and calculation for the Italian Two-For-One twister RATTI R362 / S, the principle concerning the alternatives in the decreasing of the thread-uider travel is studied in detail.

• 本文对“R362/S”倍捻机卷绕头往复导丝机构行程缩短原理进行了分析和数值计算,得出了导丝动程缩短规律。