... ultrasonic curtain sewing machine and ultrasonic semi-automatic non-woven bag making machine. Technical parameters of ultrasonic lace ... respirator (cup type masks, dust masks, disposable non-woven 3 ply face masks, etc)South Nekon ultrasonic lace ... 30%), for instance, Nylon, needlework cloth, non-woven fabrics, T\R cloth, Tetoron cloth(Polyester cloth),multilayer cloth, and other coated fabric and ...