Technicals_HeBei QingGong sewing machine Co.,Ltd

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Technical Information

installation and adjustment

1、Install the column View

2、Threading for GN20 View

3、Install and adjust the QG4900/69... View

Troubleshooting

1、Thread tension adjustment View

2、Replace loopers for GK35-8/8A View

Sewing principle

1、Thread take-up View