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21. | taper pipe thread |
| 锥形管螺纹 |
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22. | taper-type dropper |
| 锥形工具 |
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23. | taper off production |
| 逐渐停产. |
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24. | taper screw thread |
| 锥螺纹 |
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25. | taper clamping sleeve |
| 楔套|退却套 |
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26. | taper of groove |
| 轧槽斜度 |
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27. | taper faced washer |
| 锥面垫圈 |
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28. | taper plate condenser |
| 递变式平板电容器 |
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29. | taper isolated cell |
| 锥形隔离的单元 |
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30. | taper shank cutter |
| 锥柄铣刀 |
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