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通过认证 
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| 规格\尺寸 | D | d | D1 | L | L1 | L2 | L3 |
| H7 | h6 | ||||||
| 21B-14 | 30 | 14 | 27 | 17 | 5 | 4.5 | 18.7 |
| 21B-16 | 32 | 16 | 27 | 17 | 5 | 4.5 | 21 |
| 21B-18 | 35 | 18 | 29.5 | 19.5 | 7.5 | 6 | 21 |
| 21B-20 | 35 | 20 | 33.5 | 21.5 | 8 | 6.5 | 21 |
| 21B-22 | 37 | 22 | 33.5 | 21.5 | 8 | 6.5 | 24 |
| 21B-24 | 39 | 24 | 38.5 | 22.5 | 8 | 6.5 | 25 |
| 21B-25 | 40 | 25 | 38.5 | 23 | 8 | 6.5 | 25.5 |
| 21B-28 | 43 | 28 | 42 | 26.5 | 8 | 6.5 | 25.5 |
| 21B-30 | 45 | 30 | 44.5 | 26.5 | 9 | 7.5 | 25.5 |
| 21B-32 | 48 | 32 | 46 | 27.5 | 9 | 7.5 | 33.5 |
| 21B-33 | 48 | 33 | 46 | 27.5 | 9 | 7.5 | 33.5 |
| 21B-35 | 50 | 35 | 50 | 28.5 | 9 | 7.5 | 33.5 |
| 21B-38 | 56 | 38 | 53 | 30 | 9 | 7.5 | 33.5 |
| 21B-40 | 58 | 40 | 55 | 30 | 9 | 7.5 | 33.5 |
| 21B-43 | 61 | 43 | 58 | 30 | 9.5 | 8 | 36.5 |
| 21B-45 | 63 | 45 | 60 | 30 | 9.5 | 8 | 38 |
| 21B-48 | 66 | 48 | 63 | 30.5 | 9.5 | 8 | 38 |
| 21B-50 | 70 | 50 | 65 | 30.5 | 9.5 | 8 | 38 |
| 21B-53 | 73 | 53 | 70 | 33 | 9.5 | 8 | 41 |
| 21B-55 | 75 | 55 | 72 | 35 | 9.5 | 8 | 41 |
| 21B-58 | 78 | 58 | 75 | 37 | 9.5 | 8 | 42 |
| 21B-60 | 80 | 60 | 79 | 38 | 9.5 | 8 | 42 |
| 21B-65 | 85 | 65 | 84 | 40 | 9.5 | 8 | 45 |
| 21B-70 | 92 | 70 | 90 | 40 | 11 | 9.5 | 45 |
| 21B-75 | 97 | 75 | 95 | 40 | 12 | 10 | 50 |
| 21B-80 | 105 | 80 | 100 | 40 | 12 | 10 | 55 |
