... . Equipped with immovable jaw plate and movable jaw plate of key part made of ZGMn13-2 Steel, high rigidity, good wear-resistance, ... method. Rotary forced filling oil cup installed on key movable part, oil injected to some parts, easy daily maintenance.4. ... Rational design, precise manufacturing, low noise of running, superior noise index of the same type of the industry.5. Equipped with good Base ...