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| 31. | perimeter planting |
| 公园边缘草木地带 |
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| 32. | tunnel perimeter |
| 隧道周边 |
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| 33. | perimeter blasting |
| 周边爆破 |
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| 34. | Goldmann perimeter |
| 高尔顿曼视野计 |
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| 35. | perimeter light |
| 外围灯 |
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| 36. | perimeter marking |
| 周边标志 |
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| 37. | perimeter passing |
| 外围传球 |
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| 38. | heated perimeter |
| 加热范围 |
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| 39. | perimeter grouting |
| 周边管浆 |
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| 40. | perimeter ditch |
| 周边沟 |
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