What is the thread type on your ST-DFSM fabric folding sewing machine

For sewing, it is single-thread sewing on our fabric folding sewing machine. We purchased the JUKI Sewing Machine(Model DDL-8700) and modified on its base. The original sewing machine cannot work well in this application. Once the dyeing is finished, the operator just needs to pull the thread and the tubular fabric will come into open width again easily.

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