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| ◆ 外圈有一轴向缝。 |
| Outer ring with single split in axial drection. |
| ◆ ES型内、外圈有润滑油槽、油孔。 |
| Lubrication grooves and holes in the outer and inner rings of type ES. |
| ◆ （2RS）型两面带密封圈。 |
| Outer ring of type(2RS) with two seals |
| ◆ 零件表面磷化处理。 |
| Both outer and inner rings are properly phosphorlylate-treated |
| ◆ 外圈和内圈为GCr15轴承钢 |
| Outer and inner--52100Steel |
