The balloon control-rings used in ring frames divide the spinning balloon into two parts:the upper one and the lower one.
环锭细纱机安装气圈环后将形成上下两段气圈。
It would cause balloon collapse and yarn breakage in ring spinning, should the ring and traveler approach this neck portion.
环锭纺纱时，如果钢领钢丝圈位置逐步接近该气圈颈部就将造成气圈崩溃和纱线断头。
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