| 1. | 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。 |
| 2. | Standard for controlling radon and its daughters in underground space
地下建筑氡及其子体控制标准 |
| 3. | Radon and radondaughter meters and monitors ? generalrequirements
氡及氡子体测量仪与监测仪一般要求 |
| 4. | Specification for steel forgings for steam turbine rotors 300mw or above
300mw及以上汽轮机子体锻件.技术条件 |
| 5. | Estimation standards of personal cumulative exposure to radon decay products for miners
矿工氡子体个人累积暴露量估算规范 |
| 6. | Cancer of the lung has been observed in miners exposed to high concentration of radon and its decay products
由于在含高浓度氡气及其子体的环境工作，矿工的肺癌发生率因而增加。 |
| 7. | Cancer of the lung has been observed in miners exposed to high concentration of radon and its decay products
肺:由于在含高浓度氡气及其子体的环境工作，矿工的肺癌发生率因而增加。 |
| 8. | Radiation protection instrumentation - radon and radon decay product measuring instruments - part2 : specific requirements for radon measruing instruments
辐射防护用氡及氡子体测量仪第2部分：氡测量仪的特殊要求 |
| 9. | Its sensitivity and anomaly reoccurrence property are far better than usual methods , so it is widely used in the geological field
由于累积测氡时间长，其灵敏度和异常的重现性远比一般累积测氡及其子体方法好，因此，在地质领域得到了广泛的应用。 |
| 10. | Since the half - lives of neptunium - 237 and its daughter radionuclides are relatively short comparing to the age of the earth , these radionuclides are not present in the earth nowadays
由于- 237及其子体核素的半衰期远低于地球的年，它们现已不存在于地球上。相反， |
