| 型号 | 内径 | 外径 | 厚度 |
|---|---|---|---|
| HJ238E | 190 | 244.5 | 13 |
| HJ238 | 190 | 244.5 | 13 |
| NJ238 HJ238 | 190 | 340 | 55 |
| NJ238R HJ238R | 190 | 340 | 55 |
| NJ238 HJ238 | 190 | 340 | 55 |
| NJ238EM HJ238E | 190 | 340 | 55 |
| NJ238EM HJ238E | 190 | 340 | 55 |
| NJ238 HJ238 | 190 | 340 | 55 |
| NJ238E.M1 HJ238E | 190 | 340 | 55 |
| NJ238EC HJ238EC | 190 | 340 | 55 |
