... roller activities before and after a stent move flexible, automatic adjustment of high sensitivity, and meet the requirements of ... relative taxi friction movement.Because YGS, YGX bi-directional automatic self-aligning roller left and right sides is symmetrical, ... -φ-168YGS2000B=2000φ15932424702400YGS2000-Aφ168345YGS2000-φ168 YGS/X double cone two-way automatically adjustable heart roller