... lace roller applied for all kinds of nice lace, ribbons, sealing designs, cutting edges, formed flowers animals Ultrasonic lace sewing machine also ... masks, dust masks, disposable non-woven 3 ply face masks, etc) Ultrasonic lace sewing machine uses the newest ultrasonic technology, is ... damage to fabric edge, and also can avoid deckle edge.3. Chang of the ultrasonic cutting die is very easy, ...