How to assembly the thread for N600A/H portable bag closer?

 
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HOW TO CHANGE NEEDLE AND LOOPER FOR YAOHAN N600A/H?

How to change needle and looper for YaoHan N600A/H?  
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How do YaoHan N600A portable bag close sewing machine made?

How do YaoHan N600A portable bag close sewing machine made? https://www.youtube.com/watch?v=0dEuHaGv73U
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english test

englist testttt
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