Twistless roving is the fundamental mode of FGR.The twistless strand(Multi-fiber twistless roving) is pieced together from multiple parallel strand or from rhe multi-cluster strand which is put together directly by roving.The different kind of roving can be combined with polyester and epoxy through injection,molding,winding and so on,toform the FRP which has the FRP which has the high-strength.