| 摘要 |
An apparatus including a sleeve and a tag embedded into the sleeve by injection molding. The sleeve may include an outer wear resistant surface. The surface comprising a plurality of integral grooves traversing angularly along the surface. The sleeve may include a wear cage. The wear cage may include two rigid fiber reinforced polymer symmetrical halves, couplable to each other, wherein each symmetrical halve may include, an inner surface, a channel integral along the full circumferential length of the inner surface, an outer surface, and a plurality of annular elements separated by stand-offs. |
