During filling insertion a yarn can possibly break or the filling supply package might run out of yarn.
在引纬过程中，纬纱可能会断头，纬纱卷装会用。
Automatic yarn let-off system which used change gear drive for regulating run-in values.
采用交换齿轮调节送经量的积极式送经机构。
Automatic yarn let-off system which used change gear drive for regulating run-in values.
采用交换齿轮调节送经量的积极式送经机构。
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