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| 51. | vena emissaria parietalis |
| 顶导静脉 |
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| 52. | backing-out punch |
| 顶出器;冲床;冲床顶出杆 |
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| 53. | unsupported back spa |
| 空顶距|不支承的空顶距 |
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| 54. | upper space of silence |
| 顶空盲区 |
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| 55. | orange - crowned warbler |
| 黄顶莺 |
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| 56. | water column upper plug |
| 水柱顶塞 |
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| 57. | conic projection |
| 锥顶射影 |
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| 58. | a low crowned hat |
| 低顶帽 |
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| 59. | telome system |
| 顶枝系统 |
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| 60. | upsetting device |
| 顶锻机构 |
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