Model：R12
Brand：
| model | R12 |
|---|
| d | 19.05 |
|---|---|
| D | 41.275 |
| B open | 7.938 |
| B dust cap | 11.112 |
| r min. | 0.8 |
| Cr | 8370 |
|---|---|
| Cor | 4520 |
| Approx | 0.063 |
|---|
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