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31. | perforation plate |
| 穿孔底板 |
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32. | negative matrix |
| 底板|底片 |
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33. | bottom board for textile machines |
| 纺织机底板 |
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34. | Breaker plate |
| 白金底板 |
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35. | bottom slide of saddle |
| 刀架底板 |
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36. | floor elevation |
| 底板高程 |
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37. | immediate bottom |
| 直接底板 |
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38. | insulating base |
| 绝缘底板 |
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39. | Outer Bottom Plating |
| 外底板 |
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40. | brake bottom plate |
| 制动底板 |
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