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| 51. | air intake duct |
| 进气槽；进风槽 |
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| 52. | top piston land |
| 第一活塞环槽槽岸 |
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| 53. | angle of the V-groove |
| 轮槽角度|槽角度 |
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| 54. | bowl classifier |
| 分级槽|浮槽式分级机 |
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| 55. | groove and tongue |
| 槽舌;槽舌榫 |
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| 56. | unfluted shaft of column |
| 无槽立柱;无槽柱身 |
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| 57. | grooved cylinder |
| 有槽滚筒,槽纹辊 |
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| 58. | tongue and groove (T.&G.) |
| 榫槽式|榫槽式 |
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| 59. | tongue and groove face |
| 榫槽面;榫槽面 |
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| 60. | gang of cavities |
| 多槽模;多槽模型 |
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