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| 21. | A quilt stuffed with the down of the eider duck. |
| 羽绒被用绒鸭毛做芯子的被 |
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| 22. | DP2 、 D4 型气动捣固机，主要用于铸造行业捣固砂芯或小砂型。 |
| DP2、 D4 are mainly used for ramming sand core of small mould in foundry practice, whereas. |
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| 23. | Numerical calculations have been made for wave-guides with a core of rectangular cross-section embedded |
| 对于掩埋在较低折射率的均匀介质中的距形截面芯子的波导曾作过数值计算。 |
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| 24. | movable core, return core ,core puller |
| 缩呵 |
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| 25. | active rod grinding |
| 激活材料棒研磨;激活材料芯子研磨 |
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| 26. | air-press mandrel system |
| 空气加压[花筒1]芯子系统《印花》 |
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| 27. | Numerical calculations have been made for guides with a core of rectangular cross-section embedded in |
| 对于掩埋在低折射率的均匀介质中的距形截面芯子的波导曾作过数值计算。 |
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| 28. | core core collision |
| 核芯 核芯碰撞 |
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| 29. | A magnetic core, usually used for nondestructive reading, with two or more holes through which wires |
| 同multiple aperture core。 |
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| 30. | Test method for water absorption of sandwich constructions or cores |
| GB/T14207-1993夹层结构或芯子吸水性试验方法 |
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