We hope you speak Russian...
This video outlines the process used to "merrow" an embroidered emblem. It starts with embroidering the design and then cutting the shape for finishing on the MG-3U. In the video cutting is done by hand and sewing has been slowed down for illustrative purposes; in actual production, emblems patterns are die cut en masse and merrowed in a fraction of a second (circular emblems like the one depicted are edged at a rate of ~45 per minute!)
Обработка края шеврона с применением оверлока Merrow from EMBcentre on Vimeo.