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known diameter and whether the different degrees mildew, to see if it fits the number of revolutions of the machine, and the fabric being sewn satisfies the production process requirements. sewing equipment by the number of rotations to distinguish, roughly be low, medium, high-speed, ultra high-speed and other major bands region constitute used suture zone of higher order to lower order area whereabouts easy to use, and applicable suture zone on low-level device over the high-order area of the equipment may not be used, popular argument is that & ldquo; eat coarse flour and rice to eat something stomach indigestion & rdquo ;, although the

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