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| 21. | Chinese bamboo flute |
| 竹笛 |
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| 22. | The Backbone Flute |
| 脊柱横笛 |
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| 23. | spiral flute hob |
| 螺旋槽滚刀 |
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| 24. | A gutter under the eaves of a roof. |
| 水槽屋檐下的凹槽： |
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| 25. | roll flute spiral |
| 磨齿斜度 |
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| 26. | radius of flute |
| 沟底半径 |
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| 27. | terraced flute cast |
| 阶状槽铸型 |
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| 28. | flute type deformation |
| 槽型形变 |
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| 29. | relative flute position |
| 磨齿排列 |
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| 30. | gullet of saw |
| 锯齿间的凹槽 |
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