Like cars, most sewing machines have the same basic principles. The core of the automobile is the internal combustion engine, and the core of the sewing machine is the coil sewing system.
The stitching method is quite different from manual sewing. In the simplest manual stitching, the sewing person fastened a thread in the small eye of the end of the needle and then put the stitches across two pieces of fabric completely, from one side to the other, and then back to the original side. In this way, the needles move in and out of the fabric and stitch them together.
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