Upper feed roller is driven simultaneously by the mechanical transmission mechanism.
采用机械结构传动，上滚轮可与机器同步运转。
Based on the better understanding of collecting and doubling mechanism of rotor spinning, the rotor slub shape is deeply analyzed by changing the feed roller speed three times in one slub circle.
从转杯纺的凝聚和并合机理出发，对三次喂给罗拉速度变化情况下转杯竹节纱竹节形态进行了深入分析。
Feed roller is driven by an electronic frequency converter which permits stepless variation of its speed and is controled to be synchronized with doffer by the computer.
给棉罗拉采用调频电机传动，实现无级变速，通过计算机控制与道夫传动同步。
Feed roller is driven by an electronic frequency converter which permits stepless variation of its speed and is controled to be synchronized with doffer by the computer.
给棉罗拉采用调频电机传动，实现无级变速，通过计算机控制与道夫传动同步。
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