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| 21. | Rolling bearings--Double -row radial spherical roller bearings--Types and basic dimensions |
| GB/T286-1964双列向心球面滚子轴承结构型式和基本尺寸 |
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| 22. | Rolling bearings--Metric double row tapered roller bearings--Boundary dimensions |
| GB/T299-1995滚动轴承双列圆锥滚子轴承外形尺寸 |
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| 23. | Rolling bearings--Double row angular contact ball bearings--Boundary dimensions |
| GB/T296-1994滚动轴承双列角接触球轴承外形尺寸 |
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| 24. | (of clothing) fastened by lapping one edge of the front well over the other usually with a double row |
| （指衣服）通过很好的将衣服前胸的一个边缘搭接在另一个上来扣紧，通常是用两排扣来扣紧。 |
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| 25. | Scotch plaid, set with a double row of round mother-of-pearl buttons. |
| 背心是用昂贵的苏格兰花呢做的，上面钉着两排珠母圆扣，他的领结是发光的丝织品，颜色既不花俏，也不太素净。 |
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| 26. | Self aligning double row spherical roller bearing allows for a higher degree of angular deflection of |
| 自对正式双列球面滚动轴承允许驱动轴有更高的偏转角度。 |
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| 27. | Rolling bearings--Double row cylindrical roller bearings-Boundary dimensions |
| GB/T285-1994滚动轴承双列圆柱滚子轴承外形尺寸 |
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| 28. | axial clearance, contact angle and groove center distance, original clearance have been infered for the double |
| 推导了双列角接触球轴承径向游隙、向游隙、触触和沟心距及原始径向游隙之间的相互关系，给出了双列触接触球轴承内、圈沟心距及公差的确定方法。 |
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| 29. | is separable bearing,it can be subject to bi-directional load and have the function of both single row |
| 四点接触球轴承为可分离型轴承，可承受双向轴向载荷，并有单列和双列角接触球轴承的功能。 |
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| 30. | Another way to select an item is to rapidly click twice in a row. This is called double-clicking. |
| 选中某个项目的另一种方法是快速击键两次，这一操作被称为双击。 |
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