| 1. | This device is found from the fourteenth century .
这一做法出现于14世纪。 |
| 2. | This device operates similarly to the vane pump .
这种装置的运转情况与叶轮泵很相似。 |
| 3. | For 40 years this device underwent constant improvement .
四十年来，这个器件不断得到改进。 |
| 4. | We have already found the convenience of this device in other connections .
在其它方面，我们发现了这种方法的便利之处。 |
| 5. | The success of this device was, however, lost in the deluge of disaster .
然而这一计划的成就，被纷至沓来的不幸事作溟没了。 |
| 6. | Rectangular plastic cards coated with magnetic material are employed in this device .
这种装置使用涂有磁性材料的矩形塑料卡片。 |
| 7. | This device splits the light beam into a measuring light beam and a reference light beam .
此设计把光束分成测量光束和参化光束。 |
| 8. | This device is absolute in the sense that it does not require calibration in a known field of neutrons .
从不必要在已知的中子场中进行刻度的这意义上讲，这种装置是绝对的。 |
| 9. | This device helps vent gas that boils off from the liquid oxygen tank, and also bathes the top of the tank in warmed nitrogen to prevent ice from forming .
这个装置有助于排除液氧燃料箱蒸发的气体，并且它还可以用加温氮气笼罩箱顶，以防结冰。 |
| 10. | This device does not support the queried technique
此设备不支持所查询的技术。 |
