1)radon[英]['re?d?n][美]['redɑn]氡
1.Some Problems in the Action Level and Dose Assesment of Radon;氡防护标准和剂量评价中值得注意的几个问题
2.Research on Radon Concentration and Radioactivity Level of Part Coal Mine in Guizhou Province;贵州省部分煤矿氡浓度及放射性水平的研究
3.Study on radon concentration measurement in soil;土壤氡浓度的测量方法现状
英文短句/例句
1.The Research of the Radon Measurement and the Instrument of Calibration Technology;氡气测量和测氡仪器的标定技术研究
2.Studies of Radon Radiation Field in Soil and Development of Radon Measure Instruments;壤氡辐射场理论研究与测氡仪器研制
3.Harm of Radon and Radon Progeny,the Preventative Measures and Countermeasures氡及氡子体的危害与防治措施、对策
4.Study on the radon hazard and radon preventing measures in underground building地下建筑中氡的危害及防氡措施研究
5.radon effect seismic predictor氡效应地震预报装置
6.the radon level in the basement was impermissibly high.地下室的氡含量超标。
7.The radon exhalation rate is used as the basic factor of radon geological potential.氡析出率是反映氡地质潜势的最好参数。
8.Radon and radondaughter meters and monitors-General requirementsGB/T13163-1991氡及氡子体测量仪与监测仪一般要求
9.The Investigation of Indoor Radon Levels and Evaluation of the Environmental Radon Quality in Foshan City;佛山楼房室内氡水平调查及氡环境质量评价
10.Indoor Radon Concentrations and Radon Exhalation Rates of Building Materials in Shanghai上海市室内氡浓度水平与建材氡析出率的研究
11.Uncertainties of radon concentration in a standard radon chamber标准氡室氡浓度不确定度评定方法探讨
12.Initiation of a Countrywide Project on Relationship between Indoor Radon and Soil Radon全国室内氡-土壤氡关联性研究课题启动
13.Study of Active Carbon Measuring Method for Indoor Radon and Radon Daughters活性炭盒法测量室内空气中氡及其氡子体的研究
14.Standard methods for radon measurement in environmental airGB/T14582-1993环境空气中氡的标准测量方法
15.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。
16.Please fill out the“ Tax Certificate Form for Sale and Payment of Foreign Exchange”.⑶胩钚础妒鄹痘憧?咚拔衿局ど昵氡怼贰
17.Be concerned with Making up and presenting annual, monthly sales forecasts and reports.斡胫贫┠甓龋?露认?墼げ庥氡ǜ
18.The radioactive dust will contribute to higher levels of uranium and radon.放射性尘?；嵝纬捎撕?font color="#FF0000">氡的高值。
相关短句/例句
Rn[英][,ɑ:r 'en][美]['ɑr '?n]氡
1.To Detect Rn in Underground Building with Active Carbon Method;活性炭法测定地下建筑中的氡
2.TYPE KF606B Rn/γ PERSONAL DOSIMETER;KF606B型氡和γ个人剂量计
3)prevention from radon hazards and reduction of radon concentration防氡降氡
4)Decreasing and discharging radon降氡排氡
5)radon gas氡气
1.Indoor air pollutions caused by house decoration mainly include formaldehyde, benzene, ammonia and radon gas.因装修引起的住宅室内空气污染主要包括甲醛污染、苯类污染、氨气污染和氡气污染。
6)radon method氡法
1.Application of radon method to probe fire resource area in shallow depth seam;测氡法在探测浅埋煤层火源范围中的应用
延伸阅读
氡氡radon一种化学元素?；Х臨n，原子序数86，属周期系零族，为稀有气体的成员之一。氡是天然放射性元素，故又称射气。1899年R.B.欧文斯和E.卢瑟福在研究钍的放射性时发现氡220，1900年F.E.多恩在镭中发现氡222，1902年F.O.吉塞尔在锕中发现氡219。已发现的质量数199～226的氡同位素中，除了氡219、氡220、氡222是天然放射性同位素外，其余都是人工核反应合成的。由于地球表面的岩石和土壤中含铀和钍，因此在土壤、地表水和大气中都有它们的衰变产物氡。氡是无色、无臭、无味的气体，熔点－71℃，沸点－61.8℃，密度9.73克／升（0℃，1×10帕），氡在水中的溶解度大于其他稀有气体，在0℃和1×10帕，1体积水可溶解0.507体积氡，氡还易溶于煤油、甲苯、二硫化碳等有机溶剂。氡能形成氧化态为＋2和＋4的氟化物，如RnF和RnF。氡222有毒，它通过呼吸系统进入人体后，能引起肺癌，也能严重损伤肾脏，放射性工作场所空气中的最大容许放射性浓度为1.1贝可／升。氡的用途是：将铍粉和氡密封在管子内，氡衰变时放出的α粒子与铍原子核进行核反应，产生的中子可用作实验室的中子源。氡还可用作气体示踪剂，用于检测管道泄漏和研究气体运动。
