您要查找的是不是：
- Ventilation has been proved to be a main method to eliminate radon and its daughters in uranium mines. 通风是排除铀矿井空气中的氡及其子体的主要方法。
- In addition, reference is made to the novel techniques of the determination of radon and its daughter products in the atmosphere. 此外，还介绍了一些新方法，例如测量大气中的氡及其衰变产物。
- Meanwhile, study and utilization of radon and its daughters is one of the standard for gaseous substance of radioactive measurement in ionizing radiation metrology. 同时,研究和利用氡及其子体,也是电离辐射计量学中气态放射性物质测量具有标志性的重要标准之一。
- The balance rate compared radon and its daughter nuclide with their mother nuclide is increased along with the remain-time extending,and reac... 证明制备的镭标准源密封性也非常好,完全能满足测量铀系核素的要求。
- The transferring law of indoor Radon and its daughters is accounted. A numerical simulation example and some nadiation protective measures are also given. 讨论了室内氡的迁移转化规律并用数值模拟对实例进行计算;还讨论了室内氡的防护措施.
- Radon and its daughters not only are the decay product of natural radioactive uranium series and thorium series, but also are one of natural radiation source. 氡及其子体是天然放射性系列中的铀系、钍系衰变产生的,是人类受天然辐射主要的来源之一。
- In this paper,the migration model based on the theoretical hypotheses,with the help of the computer simulation,have designed the simulation system of radon and its daughters. 在氡及其子体运移假说的基础上,将计算机模拟技术引入氡运移的研究中,开发出一套在理想条件下氡及其子体运移的模拟系统。
- The Radiation Effect of Radon and Its Daughters and the Health Influence to Inhabitants 氡及其子体的辐射效应和对居民的健康影响
- Beauty`s sister is vanity. and its daughter lust. 美丽的姐妹是虚荣.;她的女儿是情欲
- A new theory of migration of radon and its daughters in the ideal condition and their migration equation 理想条件下氡及其子体运移新理论及其运移方程
- In addition, reference is made to the novel techniques of the determination of radon and its daughter products in the atmosphere 此外，还介绍了一些新方法，例如测量大气中的氡及其衰变产物。
- radon and its daughters 氡及其子体
- The accumulative doses of radon and its progeny were 55 and 101 Working Level Month (WLM). 氡及其子体的累积剂量分别为55、101WLM;
- The daughter nuclides of radon and thoron tend to become attached. 氡和钍射气的子体易被气溶胶吸附。
- Studying the self migration law of Rn and its daughters is one of basic theoretical subjects. 氡及其子体的运移规律研究是基础理论课题之一。
- It must be taken into consider seriously enough that the application of subway air results in the multiplication of indoor Radon and its filial generation concentration. 通过对地道风中氡及子体来源的分析，及给人体键康造成的危害，提出如何采取技术措施降低地道风中氡及其子体的浓度。
- But the females will soon send them away.An elephant family keeps only its daughters, mothers, grand-mothers and its great-grandmothers. 有时也会有一两只幼公象在家，但母象很快将他们赶走。
- That book ends with a summary and its conclusion. 那本书的结尾是概要和结论。
- Radon and Decay Products-is There a Risk Outside the Lung? 氡及其子体对肺以外的组织器官是否有危险?
