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| No. Z249 |
| raw material: 42CrMo |
| center distance: 86 |
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| No. Z250 |
| raw material: 45# |
| center distance: 264 |
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| No. Z251 |
| raw material: 45# |
| center distance: 264 |
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| No. Z259 |
| raw material: 20CrMnTi |
| center distance: 117 |
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| No. Z277 |
| raw material: 42CrMo |
| center distance: 354.8 |
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| No. Z305-Z310 |
| raw material: 2A14 |
center distance:
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