The functions of overlock sewing machines are sewing the edge of two pieces of cloth for edging, hemming or seaming. These machines have fewer functions than regular sewing machines (manual, electrical and computerized) made it become an additional machine to regular machine, but not a replacement for them. Using 2 to 9 threads and multiple needles, it can create overcast stitches for decorations, overlocking, overedging or merrowing.
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