| 1. | In many cases, owning to obscuration by the dust, the properties of the central star are uncertain or impossible to determine .
在许多情形下，由于尘埃的遮挡，中央星的性质是不确切或不可能确定的。 |
| 2. | Obscuration - type photoelectric smoke detector
减光型光电感烟探测器 |
| 3. | Deal with the causes of obscuration , not with the sun
（比如眼翳）需要治理的是障碍的成因，而非太阳。 |
| 4. | Fire hazard testing - part 6 - 1 : smoke obscuration - general guidance
着火危险试验.第6 - 1部分:烟雾遮蔽性.一般指南 |
| 5. | 10 . 02 test method for smoke obscuration caused by burning cables in a vertical configuration
在立式电缆槽中燃烧电缆引起的烟雾遮避性的试验方法 |
| 6. | Fire hazard testing - part 6 - 2 : smoke obscuration ; summary and relevance of test methods
火灾试验.第6 - 2部分:烟雾不透明度.试验方法的概要及其相关方面 |
| 7. | Occultation complete or partial obscuration of an astronomical object by the moon or a planet
月球和行星运行时，完全或部分掩蔽背景天体的现象，称为掩星。 |
| 8. | Methods for determination of particle size distribution - recommendations for the filter blockage method mesh obscuration
粒度分布测定法.第9部分:过滤器阻塞 |
| 9. | Test method for measurement of smoke obscuration using a conical radiant source in a single closed chamber
密闭单燃烧室中使用锥形辐射源测量烟雾昏暗度的试验方法 |
| 10. | Fire hazard testing - part 6 - 1 : smoke obscuration - general guidance iec 60695 - 6 - 1 : 2005 ; german version en 60695 - 6 - 1 : 2005
火灾试验.第6 - 1部分:烟雾遮蔽性.一般指南 |
