Radium does not occur free in nature but occurs in natural ore s such as pitchblende as a disintegration product of radioactive decay of heavier elements, including uranium.

在自然界鐳不存在游離狀態(tài)欧美裸体一级视频，但存在于天然礦石中，如瀝青鈾礦精品国产美女精品网站，是更重元素放射性衰變的產(chǎn)物性感带AV电影在线免费观看。

The volume of radon chamber is 4 m3, the range of radon concentration is 370~20 000 Bq/m3, and the relative expanded uncertainty of measurement results is no more than 5.8%. The whole testing system can verify/calibrate the radon monitor and study on the radioactive aerosol of radon decay product.

裝置氡室體積為4 m3，氡濃度測(cè)量范圍為370~20 000 Bq/m3欧美曰屁视频，氡濃度值測(cè)量結(jié)果的相對(duì)擴(kuò)展不確定度不超過(guò)5.8%sao货水喷出来了视频，可用于測(cè)氡儀器的檢定校準(zhǔn)和氡子體放射性氣溶膠的實(shí)驗(yàn)研究。

Radioactive decay studies have found a kinds of elements can be α or β decay and the decay into another element, while the α-decay product of -α-rays became one of the deep structure of the material means of .1911, the Rutherford and others bombarded atoms with α-rays observed wide-angle deflection to determine the nuclear structure of atoms and nuclei was first proposed the term .1919 year, Rutherford and others have also found that with α-ray bombardment of nitrogen will release the nuclear protons, this is the first time Artificial realization of a nuclear reaction, after the bombardment of nuclei with the radiation caused by nuclear reaction method to become the primary means of research in nuclear.

放射性衰變研究發(fā)現(xiàn)了一種元素可以通過(guò)α衰變或β衰變而變成另外一種元素最新精品国偷自产在线97，而α衰變的產(chǎn)物——α射線又成了人們探討物質(zhì)深層結(jié)構(gòu)的手段欧美一级a一片美国大黄。1911年，盧瑟福等人用α射線轟擊原子黄片一级域名、觀察到大角度偏折伊人久久AV大香综合影院，從而確定了原子的有核結(jié)構(gòu)，并首次提出原子核這一名詞黄页网站1688www欧洲人妻毛片。1919年色污网站网站，盧瑟福等人又發(fā)現(xiàn)用α射線轟擊氮核會(huì)放出質(zhì)子，這是首次用人工實(shí)現(xiàn)的核反應(yīng)人人澡人人爽人人夜夜，以后用射線轟擊原子核來(lái)引起核反應(yīng)的方法逐漸成為研究原子核的主要手段自拍偷拍精品专区。

The nuclear facilities for military business of our country in 1950 to 1970 will go into the stage of decommission, In order to make the decommission reasonable and beneficial, it request us to understand the Radioactive circumstance of the nuclear facilities, namely characteristic investigation at the beginning.

我國(guó)50-70年代為國(guó)防事業(yè)建立的軍用核設(shè)施已進(jìn)入退役階段。

During the decommissioning of nuclear facilities, it is an important step to decontaminate the soil contaminated by radioactive nuclides.

在核設(shè)施退役過(guò)程中群p网站，對(duì)放射性污染土壤的去污是一個(gè)重要環(huán)節(jié)噜噜性爱。

Comprehensive technological project descriptions are provided, for example compact, portable instruments for identification of hazardous wastes, in-the-field analysis of radioactive materials and laser systems to decontaminate equipment.

這里提供了全面的技術(shù)工程描述，例如用于檢驗(yàn)危險(xiǎn)廢物簡(jiǎn)便工具日日骚一区二区，放射性物質(zhì)的分析和凈化裝置中的激光系統(tǒng)99一级屁屁毛片。

The UAC is a multi-planetary conglomerate with radioactive waste facilities on Mars and its two moons, Phobos and Deimos.

該處理器是一個(gè)多行星礫巖與放射性廢物處理設(shè)施對(duì)火星及其兩個(gè)衛(wèi)星，火衛(wèi)一和火衛(wèi)二在线免费黄站。

An abrasive system for use in high cleaning, controlled abrasivity dentifrice compositions comprises at least one abrasive silica which may be selected from a first silica having a Radioactive Dental Abrasion in the range 30 to 150 and a second silica an RDA in the range 100 to 300, and a crystalline aluminosilicate having an average crystallite size below 0.2 mu m.

一種用于高度清潔黄色网站在线可免费播放国产的、控制磨損的牙膏組合物的磨料體系，包括可選自放射性牙齒磨損在30-150范圍內(nèi)的第一二氧化硅和RDA在100-300范圍內(nèi)的第二二氧化硅中的至少一種磨料二氧化硅午夜理论在线，和平均微晶尺寸低于0.2μm的結(jié)晶鋁硅酸鹽青青国产香蕉依人在线观看。

This national security policy of depopulation is now being carried out by means of global low-level radioactive DU pollution.

這國(guó)家安全政策的銷毀，現(xiàn)正方式進(jìn)行全球性的低放射性杜污染一级黄色一级。

The global pollution of the atmosphere with depleted uranium radioactive poison gas since 1991 is causing a global epidemic of chronic illnesses, which will contribute to extensive depopulation and ecological destruction.

全球污染大氣層與貧化鈾的放射性毒氣自1991年以來(lái)最新黄色免费网站，是導(dǎo)致全球流行的慢性疾病，這將有助於廣泛的銷毀和生態(tài)破壞亚洲无码熟妇黄色视频。