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| No. B48 |
| raw material: 40Cr |
| center distance: 132.5 |
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| No. B49 |
| raw material: 45# |
| center distance: 70.2 |
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| No. B57 |
| raw material: 45# |
| center distance: 112.6 |
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| No. B69 |
| raw material: 8620H |
| center distance: 133.4
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| No. B75 |
| raw material: 45# |
| center distance: 133 |
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| No. B76 |
| raw material: 45# |
| center distance: 133 |
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| No. B77 |
| raw material: 45# |
| center distance: 133.4 |
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| No. B83 |
| raw material: 50Mn |
| center distance: 232 |
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