... Operation:YGS, YGX bi-directional automatic self-aligning roller, two side roller adopts YaoGu type roll, the amount of tension ... other side relative friction, forcing activities stents rotation, produce roller rotation direction and belt running direction to certain Angle, ... -φ-168YGS2000B=2000φ15932424702400YGS2000-Aφ168345YGS2000-φ168 YGS/X double cone two-way automatically adjustable heart roller