查询词典 sealed radioactive source

Any of several radioactive gases that are isotopes of radon and are products of radioactive decay.

"几种氡的同位素的放射性气体，是放射性物质衰变的产物。"

The radioactive wastes release a lot of energy due to radioactive disintegration.

由于放射性蜕变，放射性废料释放出大量的能量。

The radioactive fall-out from the death last week in London of Alexander Litvinenko—a former KGB agent who was apparently poisoned with polonium—may have been small (although radioactive traces have been found on aircraft that flew between Moscow and London before Mr Litvinenko's death).

上周发生在伦敦的前俄罗斯克格勃间谍Alexander Litvinenko因为放射性钋210中毒死亡很可能会大事化小，小事化了（尽管这种放射性物质泄漏在Litvinenko死亡案之间曾经在莫斯科与伦敦之间的航班当中发现过）。

The importation of the radioactive isotope, radiation equipment and other radioactive materials should come up to applicable state regulations.

进口放射性同位素、射线装置和含有放射性物质的物品的，按照国家有关规定办理。

Because a radioactive form of argon is produced by decay of a naturally occurring radioactive potassium isotope, it can be used to date rocks and samples more than 100,000 years old.

因为它是稀有天然放射性同位素钾衰变而产生的，所以可以用来测定十万年以上的岩石年龄和采样。属类：-〖化学

Radioactive waste form performance test is one of the effective measures for ensuring safe disposal of radioactive waste.

放射性废物固化体的性能检验是保障放射性废物安全处置的有效措施之一。

Article 58 Whoever imports radioactive wastes or radioactively polluted articles into the territory of the People's Republic of China or transfers them via the territory of the People's Republic of China shall be ordered by the customs to return the said radioactive wastes or radioactively polluted articles, and shall be imposed upon a fine of not less than 500,000 Yuan but not more than 1,000,000 Yuan in addition; if a crime is constituted, he/it shall be investigated for criminal liabilities.

第五十八条向中华人民共和国境内输入放射性废物和被放射性污染的物品，或者经中华人民共和国境内转移放射性废物和被放射性污染的物品的，由海关责令退运该放射性废物和被放射性污染的物品，并处五十万元以上一百万元以下罚款；构成犯罪的，依法追究刑事责任。

One, in fact, almost all taken from the natural rock, used to bake the tiles in the soil, more or less contain a certain amount of radioelement, of course, will not cause radioactive danger, when more than a certain amount of radioactive material, would pose a threat to human health.

一、事实上，几乎所有采自大自然的岩石、烧制瓷砖用的泥土等，或多或少都含有一定量的放射性元素，当然，并非都会对人体造成放射性危害，只有当放射性物质超过一定数量时，才会对人体健康造成威胁。

The osteoid osteoma was found to have a circular or oval radiolucency which was less than 2 cm in diameter with different degrees of bone sclerosis around the nidus. Of the 9 cases, 5 showed an irregular area with less density on plain X-ray film. CT scanning showed nidus in all cases. MRI showed nidus in 1 case. Radioactive scanning showed radioactive concentration in 4 cases.

骨样骨瘤的影像学表现为一圆形或卵圆形的透亮区，直径cm，其周围有不同程度的骨质硬化。9例X线平片仅5例发现不规则密度减低区，9例CT均清楚显示病灶瘤巢； 1例MRI也观察到类似瘤巢的改变。4例同位素检查均表现为病变区核素浓聚现象。

Score was judged by conditions before and after therapy through half-quantitation grading method according to radioactive distributed defective pulmonary segments combined with radioactive degree of rarefication.

根据放射性分布缺损的肺段及放射稀疏程度相结合的半定量打分法对治疗前后进行评分。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。