... ,overcoat,etc.Applicable to a wide rage of materia The machine adopts circularly oil-offerings, little oil-consuming, further improved capability ... , through the right and left self-governed spring as well, with two straight needles, self-lubricating vertical-axis rotating hook for ... /4"57-1333.43500650*320*67050/52 DY-842A-003 high-speed double needle lockstitch sewing machine