... coverstitch 5.ISO9001 SR-500 multi needle high speed coverstitch machine Characteristics:SR-500 multi needle high speed ... this coverstitch machine could avoid threads winding.Application:SR-500 multi needle high speed coverstitch machine is suitable for ... botton hemming underwears, sportswears, etc. Parameters form:SR-500 multi needle high speed coverstitch machine sewing speedstitch lengthstitch ...