... W11S series 2)Hydraulic and mechanical type 3)Can be widely used in industry, transportation, and construction. Main Structure and Work Principle:1. This ... base, one up roller, two bottom rollers, lifting screw and other accessory parts. Lower rollers drive upper roller to ... work, then to remove the work piece. Parameters of Mechanical 3-Roll Symmetrical Plate Bending Machine (W11S Series): ModelMax. ...