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at this point, we should first check whether the used needle bent (if bend should be replaced immediately), and then manually move the needle bar drive machine needle slowly falling, the relative gap between each inspection machine needle and the presser foot, needle plate and other parts, or adjust or replace guilinbanlijiazhao.oeqtj or grinding Guilin. when lead member (the hook, shuttle, curved needles, crochet, etc.) are too close to the needle, and the needle hole hook line from the outlet at the time and would cut into neat break, although this may be a very small chance, it should cause seriously. on package sewing machine,

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